Finding the Fourth Proportional to 31,311.31, 43,211.37 and 18,572.05

Step by Step Solution

1. Step 1: Write the proportion equation
   31,311.31 : 43,211.37 = 18,572.05 : x
2. Step 2: Convert to fraction form
   31,311.31/43,211.37 = 18,572.05/x
3. Step 3: Cross multiply
   31,311.31x = 43,211.37 × 18,572.05
4. Step 4: Simplify right side
   31,311.31x = 802,523,724.21
5. Step 5: Solve for x
   x = 802,523,724.21/31,311.31
6. Step 6: Final answer
   x = 25,630.47