Finding the Fourth Proportional to 121,005.72, 181,527.98 and 42,142.36

Step by Step Solution

1. Step 1: Write the proportion equation
   121,005.72 : 181,527.98 = 42,142.36 : x
2. Step 2: Convert to fraction form
   121,005.72/181,527.98 = 42,142.36/x
3. Step 3: Cross multiply
   121,005.72x = 181,527.98 × 42,142.36
4. Step 4: Simplify right side
   121,005.72x = 7,650,017,483.23
5. Step 5: Solve for x
   x = 7,650,017,483.23/121,005.72
6. Step 6: Final answer
   x = 63,220.30