Finding the Fourth Proportional to 102,389.76, 141,298.04 and 57,066.72

Step by Step Solution

1. Step 1: Write the proportion equation
   102,389.76 : 141,298.04 = 57,066.72 : x
2. Step 2: Convert to fraction form
   102,389.76/141,298.04 = 57,066.72/x
3. Step 3: Cross multiply
   102,389.76x = 141,298.04 × 57,066.72
4. Step 4: Simplify right side
   102,389.76x = 8,063,415,685.23
5. Step 5: Solve for x
   x = 8,063,415,685.23/102,389.76
6. Step 6: Final answer
   x = 78,752.17