Finding the Fourth Proportional to 2,758,962.72, 4,138,619 and 865,778.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,758,962.72 : 4,138,619 = 865,778.88 : x
2. Step 2: Convert to fraction form
   2,758,962.72/4,138,619 = 865,778.88/x
3. Step 3: Cross multiply
   2,758,962.72x = 4,138,619 × 865,778.88
4. Step 4: Simplify right side
   2,758,962.72x = 3,583,128,922,566.72
5. Step 5: Solve for x
   x = 3,583,128,922,566.72/2,758,962.72
6. Step 6: Final answer
   x = 1,298,723.21