Finding the Fourth Proportional to 153,061.24, 229,661.16 and 78,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   153,061.24 : 229,661.16 = 78,142.72 : x
2. Step 2: Convert to fraction form
   153,061.24/229,661.16 = 78,142.72/x
3. Step 3: Cross multiply
   153,061.24x = 229,661.16 × 78,142.72
4. Step 4: Simplify right side
   153,061.24x = 17,946,347,720.76
5. Step 5: Solve for x
   x = 17,946,347,720.76/153,061.24
6. Step 6: Final answer
   x = 117,249.46