Finding the Fourth Proportional to 31,446.08, 43,168.16 and 31,150.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,446.08 : 43,168.16 = 31,150.72 : x
2. Step 2: Convert to fraction form
   31,446.08/43,168.16 = 31,150.72/x
3. Step 3: Cross multiply
   31,446.08x = 43,168.16 × 31,150.72
4. Step 4: Simplify right side
   31,446.08x = 1,344,719,265.08
5. Step 5: Solve for x
   x = 1,344,719,265.08/31,446.08
6. Step 6: Final answer
   x = 42,762.70