Finding the Fourth Proportional to 31,036.34, 42,830.16 and 16,888.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,036.34 : 42,830.16 = 16,888.88 : x
2. Step 2: Convert to fraction form
   31,036.34/42,830.16 = 16,888.88/x
3. Step 3: Cross multiply
   31,036.34x = 42,830.16 × 16,888.88
4. Step 4: Simplify right side
   31,036.34x = 723,353,432.62
5. Step 5: Solve for x
   x = 723,353,432.62/31,036.34
6. Step 6: Final answer
   x = 23,306.66