Finding the Fourth Proportional to 12,830.28, 17,705.88 and 7,525.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,830.28 : 17,705.88 = 7,525.20 : x
2. Step 2: Convert to fraction form
   12,830.28/17,705.88 = 7,525.20/x
3. Step 3: Cross multiply
   12,830.28x = 17,705.88 × 7,525.20
4. Step 4: Simplify right side
   12,830.28x = 133,240,288.18
5. Step 5: Solve for x
   x = 133,240,288.18/12,830.28
6. Step 6: Final answer
   x = 10,384.83