Finding the Fourth Proportional to 31,045.61, 42,843.12 and 16,898.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,045.61 : 42,843.12 = 16,898.42 : x
2. Step 2: Convert to fraction form
   31,045.61/42,843.12 = 16,898.42/x
3. Step 3: Cross multiply
   31,045.61x = 42,843.12 × 16,898.42
4. Step 4: Simplify right side
   31,045.61x = 723,981,035.87
5. Step 5: Solve for x
   x = 723,981,035.87/31,045.61
6. Step 6: Final answer
   x = 23,319.92