Finding the Fourth Proportional to 31,471.61, 43,425.72 and 18,725.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,471.61 : 43,425.72 = 18,725.18 : x
2. Step 2: Convert to fraction form
   31,471.61/43,425.72 = 18,725.18/x
3. Step 3: Cross multiply
   31,471.61x = 43,425.72 × 18,725.18
4. Step 4: Simplify right side
   31,471.61x = 813,154,206.50
5. Step 5: Solve for x
   x = 813,154,206.50/31,471.61
6. Step 6: Final answer
   x = 25,837.71