Finding the Fourth Proportional to 102,636.42, 141,630.18 and 57,310.86

Step by Step Solution

1. Step 1: Write the proportion equation
   102,636.42 : 141,630.18 = 57,310.86 : x
2. Step 2: Convert to fraction form
   102,636.42/141,630.18 = 57,310.86/x
3. Step 3: Cross multiply
   102,636.42x = 141,630.18 × 57,310.86
4. Step 4: Simplify right side
   102,636.42x = 8,116,947,417.75
5. Step 5: Solve for x
   x = 8,116,947,417.75/102,636.42
6. Step 6: Final answer
   x = 79,084.48