Finding the Fourth Proportional to 8,875.62, 12,240.45 and 5,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,875.62 : 12,240.45 = 5,728.50 : x
2. Step 2: Convert to fraction form
   8,875.62/12,240.45 = 5,728.50/x
3. Step 3: Cross multiply
   8,875.62x = 12,240.45 × 5,728.50
4. Step 4: Simplify right side
   8,875.62x = 70,119,417.83
5. Step 5: Solve for x
   x = 70,119,417.83/8,875.62
6. Step 6: Final answer
   x = 7,900.23