Finding the Fourth Proportional to 2,758,978.17, 4,138,642.22 and 865,794.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,758,978.17 : 4,138,642.22 = 865,794.33 : x
2. Step 2: Convert to fraction form
   2,758,978.17/4,138,642.22 = 865,794.33/x
3. Step 3: Cross multiply
   2,758,978.17x = 4,138,642.22 × 865,794.33
4. Step 4: Simplify right side
   2,758,978.17x = 3,583,212,963,645.64
5. Step 5: Solve for x
   x = 3,583,212,963,645.64/2,758,978.17
6. Step 6: Final answer
   x = 1,298,746.40