Finding the Fourth Proportional to 76,192.12, 105,148.56 and 42,658.12

Step by Step Solution

1. Step 1: Write the proportion equation
   76,192.12 : 105,148.56 = 42,658.12 : x
2. Step 2: Convert to fraction form
   76,192.12/105,148.56 = 42,658.12/x
3. Step 3: Cross multiply
   76,192.12x = 105,148.56 × 42,658.12
4. Step 4: Simplify right side
   76,192.12x = 4,485,439,890.31
5. Step 5: Solve for x
   x = 4,485,439,890.31/76,192.12
6. Step 6: Final answer
   x = 58,870.13