Finding the Fourth Proportional to 42,145.80, 63,222.32 and 10,981

Step by Step Solution

1. Step 1: Write the proportion equation
   42,145.80 : 63,222.32 = 10,981 : x
2. Step 2: Convert to fraction form
   42,145.80/63,222.32 = 10,981/x
3. Step 3: Cross multiply
   42,145.80x = 63,222.32 × 10,981
4. Step 4: Simplify right side
   42,145.80x = 694,244,295.92
5. Step 5: Solve for x
   x = 694,244,295.92/42,145.80
6. Step 6: Final answer
   x = 16,472.44