Finding the Fourth Proportional to 21,062,160, 31,593,240 and 5,105,808

Step by Step Solution

1. Step 1: Write the proportion equation
   21,062,160 : 31,593,240 = 5,105,808 : x
2. Step 2: Convert to fraction form
   21,062,160/31,593,240 = 5,105,808/x
3. Step 3: Cross multiply
   21,062,160x = 31,593,240 × 5,105,808
4. Step 4: Simplify right side
   21,062,160x = 161,309,017,537,920
5. Step 5: Solve for x
   x = 161,309,017,537,920/21,062,160
6. Step 6: Final answer
   x = 7,658,712