Finding the Fourth Proportional to 116,481.57, 160,347.89 and 86,209.85

Step by Step Solution

1. Step 1: Write the proportion equation
   116,481.57 : 160,347.89 = 86,209.85 : x
2. Step 2: Convert to fraction form
   116,481.57/160,347.89 = 86,209.85/x
3. Step 3: Cross multiply
   116,481.57x = 160,347.89 × 86,209.85
4. Step 4: Simplify right side
   116,481.57x = 13,823,566,311.93
5. Step 5: Solve for x
   x = 13,823,566,311.93/116,481.57
6. Step 6: Final answer
   x = 118,676.00