Finding the Fourth Proportional to 123,385.61, 170,300.25 and 80,289.15

Step by Step Solution

1. Step 1: Write the proportion equation
   123,385.61 : 170,300.25 = 80,289.15 : x
2. Step 2: Convert to fraction form
   123,385.61/170,300.25 = 80,289.15/x
3. Step 3: Cross multiply
   123,385.61x = 170,300.25 × 80,289.15
4. Step 4: Simplify right side
   123,385.61x = 13,673,262,317.29
5. Step 5: Solve for x
   x = 13,673,262,317.29/123,385.61
6. Step 6: Final answer
   x = 110,817.32