Finding the Fourth Proportional to 121,142.50, 181,714.55 and 42,256.42

Step by Step Solution

1. Step 1: Write the proportion equation
   121,142.50 : 181,714.55 = 42,256.42 : x
2. Step 2: Convert to fraction form
   121,142.50/181,714.55 = 42,256.42/x
3. Step 3: Cross multiply
   121,142.50x = 181,714.55 × 42,256.42
4. Step 4: Simplify right side
   121,142.50x = 7,678,606,344.91
5. Step 5: Solve for x
   x = 7,678,606,344.91/121,142.50
6. Step 6: Final answer
   x = 63,384.91