Finding the Fourth Proportional to 31,036.49, 42,830.16 and 16,889.39

Step by Step Solution

1. Step 1: Write the proportion equation
   31,036.49 : 42,830.16 = 16,889.39 : x
2. Step 2: Convert to fraction form
   31,036.49/42,830.16 = 16,889.39/x
3. Step 3: Cross multiply
   31,036.49x = 42,830.16 × 16,889.39
4. Step 4: Simplify right side
   31,036.49x = 723,375,276.00
5. Step 5: Solve for x
   x = 723,375,276.00/31,036.49
6. Step 6: Final answer
   x = 23,307.25