Finding the Fourth Proportional to 12,445.47, 17,174.31 and 6,780.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,445.47 : 17,174.31 = 6,780.12 : x
2. Step 2: Convert to fraction form
   12,445.47/17,174.31 = 6,780.12/x
3. Step 3: Cross multiply
   12,445.47x = 17,174.31 × 6,780.12
4. Step 4: Simplify right side
   12,445.47x = 116,443,882.72
5. Step 5: Solve for x
   x = 116,443,882.72/12,445.47
6. Step 6: Final answer
   x = 9,356.33