Finding the Fourth Proportional to 153,105.60, 229,425.12 and 78,222.72

Step by Step Solution

1. Step 1: Write the proportion equation
   153,105.60 : 229,425.12 = 78,222.72 : x
2. Step 2: Convert to fraction form
   153,105.60/229,425.12 = 78,222.72/x
3. Step 3: Cross multiply
   153,105.60x = 229,425.12 × 78,222.72
4. Step 4: Simplify right side
   153,105.60x = 17,946,256,922.73
5. Step 5: Solve for x
   x = 17,946,256,922.73/153,105.60
6. Step 6: Final answer
   x = 117,214.90