Finding the Fourth Proportional to 17,375.90, 23,978.76 and 9,418.10

Step by Step Solution

1. Step 1: Write the proportion equation
   17,375.90 : 23,978.76 = 9,418.10 : x
2. Step 2: Convert to fraction form
   17,375.90/23,978.76 = 9,418.10/x
3. Step 3: Cross multiply
   17,375.90x = 23,978.76 × 9,418.10
4. Step 4: Simplify right side
   17,375.90x = 225,834,359.56
5. Step 5: Solve for x
   x = 225,834,359.56/17,375.90
6. Step 6: Final answer
   x = 12,996.99