Finding the Fourth Proportional to 76,387.50, 105,415.48 and 42,854.22

Step by Step Solution

1. Step 1: Write the proportion equation
   76,387.50 : 105,415.48 = 42,854.22 : x
2. Step 2: Convert to fraction form
   76,387.50/105,415.48 = 42,854.22/x
3. Step 3: Cross multiply
   76,387.50x = 105,415.48 × 42,854.22
4. Step 4: Simplify right side
   76,387.50x = 4,517,498,171.33
5. Step 5: Solve for x
   x = 4,517,498,171.33/76,387.50
6. Step 6: Final answer
   x = 59,139.23