Finding the Fourth Proportional to 12,487.83, 17,235.96 and 7,949.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,487.83 : 17,235.96 = 7,949.55 : x
2. Step 2: Convert to fraction form
   12,487.83/17,235.96 = 7,949.55/x
3. Step 3: Cross multiply
   12,487.83x = 17,235.96 × 7,949.55
4. Step 4: Simplify right side
   12,487.83x = 137,018,125.82
5. Step 5: Solve for x
   x = 137,018,125.82/12,487.83
6. Step 6: Final answer
   x = 10,972.13