Finding the Fourth Proportional to 116,488.60, 160,357.56 and 86,216.86

Step by Step Solution

1. Step 1: Write the proportion equation
   116,488.60 : 160,357.56 = 86,216.86 : x
2. Step 2: Convert to fraction form
   116,488.60/160,357.56 = 86,216.86/x
3. Step 3: Cross multiply
   116,488.60x = 160,357.56 × 86,216.86
4. Step 4: Simplify right side
   116,488.60x = 13,825,525,300.46
5. Step 5: Solve for x
   x = 13,825,525,300.46/116,488.60
6. Step 6: Final answer
   x = 118,685.65