Finding the Fourth Proportional to 103,659.30, 155,258.55 and 89,835.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,659.30 : 155,258.55 = 89,835.30 : x
2. Step 2: Convert to fraction form
   103,659.30/155,258.55 = 89,835.30/x
3. Step 3: Cross multiply
   103,659.30x = 155,258.55 × 89,835.30
4. Step 4: Simplify right side
   103,659.30x = 13,947,698,416.82
5. Step 5: Solve for x
   x = 13,947,698,416.82/103,659.30
6. Step 6: Final answer
   x = 134,553.28