Finding the Fourth Proportional to 13,139,323, 18,000,570.11 and 12,648,084.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,139,323 : 18,000,570.11 = 12,648,084.46 : x
2. Step 2: Convert to fraction form
   13,139,323/18,000,570.11 = 12,648,084.46/x
3. Step 3: Cross multiply
   13,139,323x = 18,000,570.11 × 12,648,084.46
4. Step 4: Simplify right side
   13,139,323x = 227,672,731,079,431.50
5. Step 5: Solve for x
   x = 227,672,731,079,431.50/13,139,323
6. Step 6: Final answer
   x = 17,327,584.62