Finding the Fourth Proportional to 12,825.61, 17,699.41 and 7,520.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,825.61 : 17,699.41 = 7,520.51 : x
2. Step 2: Convert to fraction form
   12,825.61/17,699.41 = 7,520.51/x
3. Step 3: Cross multiply
   12,825.61x = 17,699.41 × 7,520.51
4. Step 4: Simplify right side
   12,825.61x = 133,108,643.55
5. Step 5: Solve for x
   x = 133,108,643.55/12,825.61
6. Step 6: Final answer
   x = 10,378.35