Finding the Fourth Proportional to 12,145,309,851.72, 18,220,449,530.53 and 4,176,443,139.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,145,309,851.72 : 18,220,449,530.53 = 4,176,443,139.81 : x
2. Step 2: Convert to fraction form
   12,145,309,851.72/18,220,449,530.53 = 4,176,443,139.81/x
3. Step 3: Cross multiply
   12,145,309,851.72x = 18,220,449,530.53 × 4,176,443,139.81
4. Step 4: Simplify right side
   12,145,309,851.72x = 76,096,671,446,036,348,928
5. Step 5: Solve for x
   x = 76,096,671,446,036,348,928/12,145,309,851.72
6. Step 6: Final answer
   x = 6,265,519,148.96