Finding the Fourth Proportional to 31,777.20, 43,763.76 and 31,088.43

Step by Step Solution

1. Step 1: Write the proportion equation
   31,777.20 : 43,763.76 = 31,088.43 : x
2. Step 2: Convert to fraction form
   31,777.20/43,763.76 = 31,088.43/x
3. Step 3: Cross multiply
   31,777.20x = 43,763.76 × 31,088.43
4. Step 4: Simplify right side
   31,777.20x = 1,360,546,589.30
5. Step 5: Solve for x
   x = 1,360,546,589.30/31,777.20
6. Step 6: Final answer
   x = 42,815.18