Finding the Fourth Proportional to 76,587.15, 105,689.28 and 42,595.50

Step by Step Solution

1. Step 1: Write the proportion equation
   76,587.15 : 105,689.28 = 42,595.50 : x
2. Step 2: Convert to fraction form
   76,587.15/105,689.28 = 42,595.50/x
3. Step 3: Cross multiply
   76,587.15x = 105,689.28 × 42,595.50
4. Step 4: Simplify right side
   76,587.15x = 4,501,887,726.24
5. Step 5: Solve for x
   x = 4,501,887,726.24/76,587.15
6. Step 6: Final answer
   x = 58,781.24