Finding the Fourth Proportional to 12,354.71, 17,031.62 and 7,630.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,354.71 : 17,031.62 = 7,630.79 : x
2. Step 2: Convert to fraction form
   12,354.71/17,031.62 = 7,630.79/x
3. Step 3: Cross multiply
   12,354.71x = 17,031.62 × 7,630.79
4. Step 4: Simplify right side
   12,354.71x = 129,964,677.43
5. Step 5: Solve for x
   x = 129,964,677.43/12,354.71
6. Step 6: Final answer
   x = 10,519.44