Finding the Fourth Proportional to 76,134.31, 105,062.65 and 42,142.86

Step by Step Solution

1. Step 1: Write the proportion equation
   76,134.31 : 105,062.65 = 42,142.86 : x
2. Step 2: Convert to fraction form
   76,134.31/105,062.65 = 42,142.86/x
3. Step 3: Cross multiply
   76,134.31x = 105,062.65 × 42,142.86
4. Step 4: Simplify right side
   76,134.31x = 4,427,640,550.18
5. Step 5: Solve for x
   x = 4,427,640,550.18/76,134.31
6. Step 6: Final answer
   x = 58,155.65