Finding the Fourth Proportional to 76,200.78, 105,155.97 and 42,209.16

Step by Step Solution

1. Step 1: Write the proportion equation
   76,200.78 : 105,155.97 = 42,209.16 : x
2. Step 2: Convert to fraction form
   76,200.78/105,155.97 = 42,209.16/x
3. Step 3: Cross multiply
   76,200.78x = 105,155.97 × 42,209.16
4. Step 4: Simplify right side
   76,200.78x = 4,438,545,162.69
5. Step 5: Solve for x
   x = 4,438,545,162.69/76,200.78
6. Step 6: Final answer
   x = 58,248.03