Finding the Fourth Proportional to 42,380.40, 63,571 and 10,790.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,380.40 : 63,571 = 10,790.52 : x
2. Step 2: Convert to fraction form
   42,380.40/63,571 = 10,790.52/x
3. Step 3: Cross multiply
   42,380.40x = 63,571 × 10,790.52
4. Step 4: Simplify right side
   42,380.40x = 685,964,146.92
5. Step 5: Solve for x
   x = 685,964,146.92/42,380.40
6. Step 6: Final answer
   x = 16,185.88