Finding the Fourth Proportional to 121,255.98, 181,936.89 and 42,426.78

Step by Step Solution

1. Step 1: Write the proportion equation
   121,255.98 : 181,936.89 = 42,426.78 : x
2. Step 2: Convert to fraction form
   121,255.98/181,936.89 = 42,426.78/x
3. Step 3: Cross multiply
   121,255.98x = 181,936.89 × 42,426.78
4. Step 4: Simplify right side
   121,255.98x = 7,718,996,405.91
5. Step 5: Solve for x
   x = 7,718,996,405.91/121,255.98
6. Step 6: Final answer
   x = 63,658.69