Finding the Fourth Proportional to 42,140.80, 63,214.82 and 10,976

Step by Step Solution

1. Step 1: Write the proportion equation
   42,140.80 : 63,214.82 = 10,976 : x
2. Step 2: Convert to fraction form
   42,140.80/63,214.82 = 10,976/x
3. Step 3: Cross multiply
   42,140.80x = 63,214.82 × 10,976
4. Step 4: Simplify right side
   42,140.80x = 693,845,864.32
5. Step 5: Solve for x
   x = 693,845,864.32/42,140.80
6. Step 6: Final answer
   x = 16,464.94