Finding the Fourth Proportional to 31,579.85, 43,579.55 and 18,150.76

Step by Step Solution

1. Step 1: Write the proportion equation
   31,579.85 : 43,579.55 = 18,150.76 : x
2. Step 2: Convert to fraction form
   31,579.85/43,579.55 = 18,150.76/x
3. Step 3: Cross multiply
   31,579.85x = 43,579.55 × 18,150.76
4. Step 4: Simplify right side
   31,579.85x = 791,001,644.31
5. Step 5: Solve for x
   x = 791,001,644.31/31,579.85
6. Step 6: Final answer
   x = 25,047.67