Finding the Fourth Proportional to 68,172.71, 102,123.72 and 53,312.04

Step by Step Solution

1. Step 1: Write the proportion equation
   68,172.71 : 102,123.72 = 53,312.04 : x
2. Step 2: Convert to fraction form
   68,172.71/102,123.72 = 53,312.04/x
3. Step 3: Cross multiply
   68,172.71x = 102,123.72 × 53,312.04
4. Step 4: Simplify right side
   68,172.71x = 5,444,423,845.59
5. Step 5: Solve for x
   x = 5,444,423,845.59/68,172.71
6. Step 6: Final answer
   x = 79,862.22