Finding the Fourth Proportional to 121,345.30, 181,985.55 and 42,451.30

Step by Step Solution

1. Step 1: Write the proportion equation
   121,345.30 : 181,985.55 = 42,451.30 : x
2. Step 2: Convert to fraction form
   121,345.30/181,985.55 = 42,451.30/x
3. Step 3: Cross multiply
   121,345.30x = 181,985.55 × 42,451.30
4. Step 4: Simplify right side
   121,345.30x = 7,725,523,178.72
5. Step 5: Solve for x
   x = 7,725,523,178.72/121,345.30
6. Step 6: Final answer
   x = 63,665.62