Finding the Fourth Proportional to 42,443.60, 63,665.33 and 11,278.85

Step by Step Solution

1. Step 1: Write the proportion equation
   42,443.60 : 63,665.33 = 11,278.85 : x
2. Step 2: Convert to fraction form
   42,443.60/63,665.33 = 11,278.85/x
3. Step 3: Cross multiply
   42,443.60x = 63,665.33 × 11,278.85
4. Step 4: Simplify right side
   42,443.60x = 718,071,332.55
5. Step 5: Solve for x
   x = 718,071,332.55/42,443.60
6. Step 6: Final answer
   x = 16,918.25