Finding the Fourth Proportional to 12,445.74, 17,171.46 and 7,407.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,445.74 : 17,171.46 = 7,407.43 : x
2. Step 2: Convert to fraction form
   12,445.74/17,171.46 = 7,407.43/x
3. Step 3: Cross multiply
   12,445.74x = 17,171.46 × 7,407.43
4. Step 4: Simplify right side
   12,445.74x = 127,196,345.02
5. Step 5: Solve for x
   x = 127,196,345.02/12,445.74
6. Step 6: Final answer
   x = 10,220.07