Finding the Fourth Proportional to 103,630.30, 155,215.05 and 89,806.30

Step by Step Solution

1. Step 1: Write the proportion equation
   103,630.30 : 155,215.05 = 89,806.30 : x
2. Step 2: Convert to fraction form
   103,630.30/155,215.05 = 89,806.30/x
3. Step 3: Cross multiply
   103,630.30x = 155,215.05 × 89,806.30
4. Step 4: Simplify right side
   103,630.30x = 13,939,289,344.82
5. Step 5: Solve for x
   x = 13,939,289,344.82/103,630.30
6. Step 6: Final answer
   x = 134,509.78