Finding the Fourth Proportional to 28,314.32, 42,471.80 and 8,592.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,314.32 : 42,471.80 = 8,592.72 : x
2. Step 2: Convert to fraction form
   28,314.32/42,471.80 = 8,592.72/x
3. Step 3: Cross multiply
   28,314.32x = 42,471.80 × 8,592.72
4. Step 4: Simplify right side
   28,314.32x = 364,948,285.30
5. Step 5: Solve for x
   x = 364,948,285.30/28,314.32
6. Step 6: Final answer
   x = 12,889.18