Finding the Fourth Proportional to 28,109.91, 42,152.50 and 14,959.15

Step by Step Solution

1. Step 1: Write the proportion equation
   28,109.91 : 42,152.50 = 14,959.15 : x
2. Step 2: Convert to fraction form
   28,109.91/42,152.50 = 14,959.15/x
3. Step 3: Cross multiply
   28,109.91x = 42,152.50 × 14,959.15
4. Step 4: Simplify right side
   28,109.91x = 630,565,570.38
5. Step 5: Solve for x
   x = 630,565,570.38/28,109.91
6. Step 6: Final answer
   x = 22,432.14