Finding the Fourth Proportional to 123,384.61, 170,298.87 and 80,288.15

Step by Step Solution

1. Step 1: Write the proportion equation
   123,384.61 : 170,298.87 = 80,288.15 : x
2. Step 2: Convert to fraction form
   123,384.61/170,298.87 = 80,288.15/x
3. Step 3: Cross multiply
   123,384.61x = 170,298.87 × 80,288.15
4. Step 4: Simplify right side
   123,384.61x = 13,672,981,219.39
5. Step 5: Solve for x
   x = 13,672,981,219.39/123,384.61
6. Step 6: Final answer
   x = 110,815.94