Finding the Fourth Proportional to 31,084.39, 42,902.01 and 18,336.79

Step by Step Solution

1. Step 1: Write the proportion equation
   31,084.39 : 42,902.01 = 18,336.79 : x
2. Step 2: Convert to fraction form
   31,084.39/42,902.01 = 18,336.79/x
3. Step 3: Cross multiply
   31,084.39x = 42,902.01 × 18,336.79
4. Step 4: Simplify right side
   31,084.39x = 786,685,147.95
5. Step 5: Solve for x
   x = 786,685,147.95/31,084.39
6. Step 6: Final answer
   x = 25,308.05