Finding the Fourth Proportional to 31,013.62, 42,799.08 and 18,435.94

Step by Step Solution

1. Step 1: Write the proportion equation
   31,013.62 : 42,799.08 = 18,435.94 : x
2. Step 2: Convert to fraction form
   31,013.62/42,799.08 = 18,435.94/x
3. Step 3: Cross multiply
   31,013.62x = 42,799.08 × 18,435.94
4. Step 4: Simplify right side
   31,013.62x = 789,041,233.07
5. Step 5: Solve for x
   x = 789,041,233.07/31,013.62
6. Step 6: Final answer
   x = 25,441.77