Finding the Fourth Proportional to 17,375.85, 23,978.59 and 9,418.05

Step by Step Solution

1. Step 1: Write the proportion equation
   17,375.85 : 23,978.59 = 9,418.05 : x
2. Step 2: Convert to fraction form
   17,375.85/23,978.59 = 9,418.05/x
3. Step 3: Cross multiply
   17,375.85x = 23,978.59 × 9,418.05
4. Step 4: Simplify right side
   17,375.85x = 225,831,536.00
5. Step 5: Solve for x
   x = 225,831,536.00/17,375.85
6. Step 6: Final answer
   x = 12,996.86