Finding the Fourth Proportional to 111,408.55, 153,803.53 and 86,046.19

Step by Step Solution

1. Step 1: Write the proportion equation
   111,408.55 : 153,803.53 = 86,046.19 : x
2. Step 2: Convert to fraction form
   111,408.55/153,803.53 = 86,046.19/x
3. Step 3: Cross multiply
   111,408.55x = 153,803.53 × 86,046.19
4. Step 4: Simplify right side
   111,408.55x = 13,234,207,488.10
5. Step 5: Solve for x
   x = 13,234,207,488.10/111,408.55
6. Step 6: Final answer
   x = 118,789.88