Finding the Fourth Proportional to 12,828.79, 17,699.05 and 7,522.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,828.79 : 17,699.05 = 7,522.58 : x
2. Step 2: Convert to fraction form
   12,828.79/17,699.05 = 7,522.58/x
3. Step 3: Cross multiply
   12,828.79x = 17,699.05 × 7,522.58
4. Step 4: Simplify right side
   12,828.79x = 133,142,519.55
5. Step 5: Solve for x
   x = 133,142,519.55/12,828.79
6. Step 6: Final answer
   x = 10,378.42