Finding the Fourth Proportional to 103,679.67, 155,826.24 and 86,024.86

Step by Step Solution

1. Step 1: Write the proportion equation
   103,679.67 : 155,826.24 = 86,024.86 : x
2. Step 2: Convert to fraction form
   103,679.67/155,826.24 = 86,024.86/x
3. Step 3: Cross multiply
   103,679.67x = 155,826.24 × 86,024.86
4. Step 4: Simplify right side
   103,679.67x = 13,404,930,480.33
5. Step 5: Solve for x
   x = 13,404,930,480.33/103,679.67
6. Step 6: Final answer
   x = 129,291.79