Finding the Fourth Proportional to 12,697.43, 17,521.60 and 7,031.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,697.43 : 17,521.60 = 7,031.78 : x
2. Step 2: Convert to fraction form
   12,697.43/17,521.60 = 7,031.78/x
3. Step 3: Cross multiply
   12,697.43x = 17,521.60 × 7,031.78
4. Step 4: Simplify right side
   12,697.43x = 123,208,036.45
5. Step 5: Solve for x
   x = 123,208,036.45/12,697.43
6. Step 6: Final answer
   x = 9,703.38