Finding the Fourth Proportional to 31,084.89, 42,902.70 and 18,337.29

Step by Step Solution

1. Step 1: Write the proportion equation
   31,084.89 : 42,902.70 = 18,337.29 : x
2. Step 2: Convert to fraction form
   31,084.89/42,902.70 = 18,337.29/x
3. Step 3: Cross multiply
   31,084.89x = 42,902.70 × 18,337.29
4. Step 4: Simplify right side
   31,084.89x = 786,719,251.68
5. Step 5: Solve for x
   x = 786,719,251.68/31,084.89
6. Step 6: Final answer
   x = 25,308.74