Finding the Fourth Proportional to 57,730.86, 86,611.68 and 18,288.72

Step by Step Solution

1. Step 1: Write the proportion equation
   57,730.86 : 86,611.68 = 18,288.72 : x
2. Step 2: Convert to fraction form
   57,730.86/86,611.68 = 18,288.72/x
3. Step 3: Cross multiply
   57,730.86x = 86,611.68 × 18,288.72
4. Step 4: Simplify right side
   57,730.86x = 1,584,016,764.25
5. Step 5: Solve for x
   x = 1,584,016,764.25/57,730.86
6. Step 6: Final answer
   x = 27,437.96