Finding the Fourth Proportional to 57,670.52, 86,519.75 and 28,081.62

Step by Step Solution

1. Step 1: Write the proportion equation
   57,670.52 : 86,519.75 = 28,081.62 : x
2. Step 2: Convert to fraction form
   57,670.52/86,519.75 = 28,081.62/x
3. Step 3: Cross multiply
   57,670.52x = 86,519.75 × 28,081.62
4. Step 4: Simplify right side
   57,670.52x = 2,429,614,601.59
5. Step 5: Solve for x
   x = 2,429,614,601.59/57,670.52
6. Step 6: Final answer
   x = 42,129.23