Finding the Fourth Proportional to 103,658.30, 155,257.05 and 89,834.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,658.30 : 155,257.05 = 89,834.30 : x
2. Step 2: Convert to fraction form
   103,658.30/155,257.05 = 89,834.30/x
3. Step 3: Cross multiply
   103,658.30x = 155,257.05 × 89,834.30
4. Step 4: Simplify right side
   103,658.30x = 13,947,408,406.82
5. Step 5: Solve for x
   x = 13,947,408,406.82/103,658.30
6. Step 6: Final answer
   x = 134,551.78