Finding the Fourth Proportional to 102,402.22, 141,310.56 and 57,085.18

Step by Step Solution

1. Step 1: Write the proportion equation
   102,402.22 : 141,310.56 = 57,085.18 : x
2. Step 2: Convert to fraction form
   102,402.22/141,310.56 = 57,085.18/x
3. Step 3: Cross multiply
   102,402.22x = 141,310.56 × 57,085.18
4. Step 4: Simplify right side
   102,402.22x = 8,066,738,753.50
5. Step 5: Solve for x
   x = 8,066,738,753.50/102,402.22
6. Step 6: Final answer
   x = 78,775.04