Finding the Fourth Proportional to 12,407.86, 17,131.79 and 7,634.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,407.86 : 17,131.79 = 7,634.23 : x
2. Step 2: Convert to fraction form
   12,407.86/17,131.79 = 7,634.23/x
3. Step 3: Cross multiply
   12,407.86x = 17,131.79 × 7,634.23
4. Step 4: Simplify right side
   12,407.86x = 130,788,001.43
5. Step 5: Solve for x
   x = 130,788,001.43/12,407.86
6. Step 6: Final answer
   x = 10,540.74