Finding the Fourth Proportional to 14,042.72, 21,074.96 and 5,285.60

Step by Step Solution

1. Step 1: Write the proportion equation
   14,042.72 : 21,074.96 = 5,285.60 : x
2. Step 2: Convert to fraction form
   14,042.72/21,074.96 = 5,285.60/x
3. Step 3: Cross multiply
   14,042.72x = 21,074.96 × 5,285.60
4. Step 4: Simplify right side
   14,042.72x = 111,393,808.58
5. Step 5: Solve for x
   x = 111,393,808.58/14,042.72
6. Step 6: Final answer
   x = 7,932.50