Finding the Fourth Proportional to 31,045.47, 42,842.74 and 16,898.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,045.47 : 42,842.74 = 16,898.42 : x
2. Step 2: Convert to fraction form
   31,045.47/42,842.74 = 16,898.42/x
3. Step 3: Cross multiply
   31,045.47x = 42,842.74 × 16,898.42
4. Step 4: Simplify right side
   31,045.47x = 723,974,614.47
5. Step 5: Solve for x
   x = 723,974,614.47/31,045.47
6. Step 6: Final answer
   x = 23,319.81