Finding the Fourth Proportional to 12,317.43, 17,000.78 and 7,538.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,317.43 : 17,000.78 = 7,538.43 : x
2. Step 2: Convert to fraction form
   12,317.43/17,000.78 = 7,538.43/x
3. Step 3: Cross multiply
   12,317.43x = 17,000.78 × 7,538.43
4. Step 4: Simplify right side
   12,317.43x = 128,159,152.28
5. Step 5: Solve for x
   x = 128,159,152.28/12,317.43
6. Step 6: Final answer
   x = 10,404.70