Finding the Fourth Proportional to 42,007.76, 63,023.93 and 12,426.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,007.76 : 63,023.93 = 12,426.38 : x
2. Step 2: Convert to fraction form
   42,007.76/63,023.93 = 12,426.38/x
3. Step 3: Cross multiply
   42,007.76x = 63,023.93 × 12,426.38
4. Step 4: Simplify right side
   42,007.76x = 783,158,988.15
5. Step 5: Solve for x
   x = 783,158,988.15/42,007.76
6. Step 6: Final answer
   x = 18,643.20