Finding the Fourth Proportional to 12,445.85, 17,167.55 and 7,406.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,445.85 : 17,167.55 = 7,406.64 : x
2. Step 2: Convert to fraction form
   12,445.85/17,167.55 = 7,406.64/x
3. Step 3: Cross multiply
   12,445.85x = 17,167.55 × 7,406.64
4. Step 4: Simplify right side
   12,445.85x = 127,153,825.50
5. Step 5: Solve for x
   x = 127,153,825.50/12,445.85
6. Step 6: Final answer
   x = 10,216.56