Finding the Fourth Proportional to 22,725.20, 34,089.72 and 7,147.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,725.20 : 34,089.72 = 7,147.28 : x
2. Step 2: Convert to fraction form
   22,725.20/34,089.72 = 7,147.28/x
3. Step 3: Cross multiply
   22,725.20x = 34,089.72 × 7,147.28
4. Step 4: Simplify right side
   22,725.20x = 243,648,773.96
5. Step 5: Solve for x
   x = 243,648,773.96/22,725.20
6. Step 6: Final answer
   x = 10,721.52