Finding the Fourth Proportional to 76,078.50, 104,987.23 and 42,086.17

Step by Step Solution

1. Step 1: Write the proportion equation
   76,078.50 : 104,987.23 = 42,086.17 : x
2. Step 2: Convert to fraction form
   76,078.50/104,987.23 = 42,086.17/x
3. Step 3: Cross multiply
   76,078.50x = 104,987.23 × 42,086.17
4. Step 4: Simplify right side
   76,078.50x = 4,418,510,409.61
5. Step 5: Solve for x
   x = 4,418,510,409.61/76,078.50
6. Step 6: Final answer
   x = 58,078.31