Finding the Fourth Proportional to 76,134.32, 105,063.90 and 42,142.83

Step by Step Solution

1. Step 1: Write the proportion equation
   76,134.32 : 105,063.90 = 42,142.83 : x
2. Step 2: Convert to fraction form
   76,134.32/105,063.90 = 42,142.83/x
3. Step 3: Cross multiply
   76,134.32x = 105,063.90 × 42,142.83
4. Step 4: Simplify right side
   76,134.32x = 4,427,690,076.84
5. Step 5: Solve for x
   x = 4,427,690,076.84/76,134.32
6. Step 6: Final answer
   x = 58,156.30