Finding the Fourth Proportional to 103,661.30, 155,261.55 and 89,837.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,661.30 : 155,261.55 = 89,837.30 : x
2. Step 2: Convert to fraction form
   103,661.30/155,261.55 = 89,837.30/x
3. Step 3: Cross multiply
   103,661.30x = 155,261.55 × 89,837.30
4. Step 4: Simplify right side
   103,661.30x = 13,948,278,445.82
5. Step 5: Solve for x
   x = 13,948,278,445.82/103,661.30
6. Step 6: Final answer
   x = 134,556.28