Finding the Fourth Proportional to 10,326.72, 15,490.17 and 2,931.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,326.72 : 15,490.17 = 2,931.42 : x
2. Step 2: Convert to fraction form
   10,326.72/15,490.17 = 2,931.42/x
3. Step 3: Cross multiply
   10,326.72x = 15,490.17 × 2,931.42
4. Step 4: Simplify right side
   10,326.72x = 45,408,194.14
5. Step 5: Solve for x
   x = 45,408,194.14/10,326.72
6. Step 6: Final answer
   x = 4,397.16