Finding the Fourth Proportional to 123,380.61, 170,293.35 and 80,284.15

Step by Step Solution

1. Step 1: Write the proportion equation
   123,380.61 : 170,293.35 = 80,284.15 : x
2. Step 2: Convert to fraction form
   123,380.61/170,293.35 = 80,284.15/x
3. Step 3: Cross multiply
   123,380.61x = 170,293.35 × 80,284.15
4. Step 4: Simplify right side
   123,380.61x = 13,671,856,855.40
5. Step 5: Solve for x
   x = 13,671,856,855.40/123,380.61
6. Step 6: Final answer
   x = 110,810.42