Finding the Fourth Proportional to 31,146.39, 42,981.84 and 16,999.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,146.39 : 42,981.84 = 16,999.34 : x
2. Step 2: Convert to fraction form
   31,146.39/42,981.84 = 16,999.34/x
3. Step 3: Cross multiply
   31,146.39x = 42,981.84 × 16,999.34
4. Step 4: Simplify right side
   31,146.39x = 730,662,697.08
5. Step 5: Solve for x
   x = 730,662,697.08/31,146.39
6. Step 6: Final answer
   x = 23,458.99