Finding the Fourth Proportional to 126,401.85, 174,504.61 and 86,174.72

Step by Step Solution

1. Step 1: Write the proportion equation
   126,401.85 : 174,504.61 = 86,174.72 : x
2. Step 2: Convert to fraction form
   126,401.85/174,504.61 = 86,174.72/x
3. Step 3: Cross multiply
   126,401.85x = 174,504.61 × 86,174.72
4. Step 4: Simplify right side
   126,401.85x = 15,037,885,795.05
5. Step 5: Solve for x
   x = 15,037,885,795.05/126,401.85
6. Step 6: Final answer
   x = 118,968.87