Finding the Fourth Proportional to 42,116.74, 58,073.88 and 28,695.85

Step by Step Solution

1. Step 1: Write the proportion equation
   42,116.74 : 58,073.88 = 28,695.85 : x
2. Step 2: Convert to fraction form
   42,116.74/58,073.88 = 28,695.85/x
3. Step 3: Cross multiply
   42,116.74x = 58,073.88 × 28,695.85
4. Step 4: Simplify right side
   42,116.74x = 1,666,479,311.82
5. Step 5: Solve for x
   x = 1,666,479,311.82/42,116.74
6. Step 6: Final answer
   x = 39,568.10