Finding the Fourth Proportional to 155,686.72, 214,858.60 and 88,618.72

Step by Step Solution

1. Step 1: Write the proportion equation
   155,686.72 : 214,858.60 = 88,618.72 : x
2. Step 2: Convert to fraction form
   155,686.72/214,858.60 = 88,618.72/x
3. Step 3: Cross multiply
   155,686.72x = 214,858.60 × 88,618.72
4. Step 4: Simplify right side
   155,686.72x = 19,040,494,112.99
5. Step 5: Solve for x
   x = 19,040,494,112.99/155,686.72
6. Step 6: Final answer
   x = 122,300.05