Finding the Fourth Proportional to 31,824.37, 43,911.84 and 18,390.70

Step by Step Solution

1. Step 1: Write the proportion equation
   31,824.37 : 43,911.84 = 18,390.70 : x
2. Step 2: Convert to fraction form
   31,824.37/43,911.84 = 18,390.70/x
3. Step 3: Cross multiply
   31,824.37x = 43,911.84 × 18,390.70
4. Step 4: Simplify right side
   31,824.37x = 807,569,475.89
5. Step 5: Solve for x
   x = 807,569,475.89/31,824.37
6. Step 6: Final answer
   x = 25,375.82