Finding the Fourth Proportional to 102,118.16, 140,935.72 and 57,406.16

Step by Step Solution

1. Step 1: Write the proportion equation
   102,118.16 : 140,935.72 = 57,406.16 : x
2. Step 2: Convert to fraction form
   102,118.16/140,935.72 = 57,406.16/x
3. Step 3: Cross multiply
   102,118.16x = 140,935.72 × 57,406.16
4. Step 4: Simplify right side
   102,118.16x = 8,090,578,492.04
5. Step 5: Solve for x
   x = 8,090,578,492.04/102,118.16
6. Step 6: Final answer
   x = 79,227.62