Finding the Fourth Proportional to 2,662,659.70, 3,993,005.40 and 865,601.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662,659.70 : 3,993,005.40 = 865,601.80 : x
2. Step 2: Convert to fraction form
   2,662,659.70/3,993,005.40 = 865,601.80/x
3. Step 3: Cross multiply
   2,662,659.70x = 3,993,005.40 × 865,601.80
4. Step 4: Simplify right side
   2,662,659.70x = 3,456,352,661,649.72
5. Step 5: Solve for x
   x = 3,456,352,661,649.72/2,662,659.70
6. Step 6: Final answer
   x = 1,298,082.76