Finding the Fourth Proportional to 126,978.78, 175,221.27 and 69,608.91

Step by Step Solution

1. Step 1: Write the proportion equation
   126,978.78 : 175,221.27 = 69,608.91 : x
2. Step 2: Convert to fraction form
   126,978.78/175,221.27 = 69,608.91/x
3. Step 3: Cross multiply
   126,978.78x = 175,221.27 × 69,608.91
4. Step 4: Simplify right side
   126,978.78x = 12,196,961,613.52
5. Step 5: Solve for x
   x = 12,196,961,613.52/126,978.78
6. Step 6: Final answer
   x = 96,055.12