Finding the Fourth Proportional to 12,848.72, 17,729.88 and 7,545.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,848.72 : 17,729.88 = 7,545.20 : x
2. Step 2: Convert to fraction form
   12,848.72/17,729.88 = 7,545.20/x
3. Step 3: Cross multiply
   12,848.72x = 17,729.88 × 7,545.20
4. Step 4: Simplify right side
   12,848.72x = 133,775,490.58
5. Step 5: Solve for x
   x = 133,775,490.58/12,848.72
6. Step 6: Final answer
   x = 10,411.58