Finding the Fourth Proportional to 2,116,978.34, 3,174,464.19 and 820,736.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116,978.34 : 3,174,464.19 = 820,736.42 : x
2. Step 2: Convert to fraction form
   2,116,978.34/3,174,464.19 = 820,736.42/x
3. Step 3: Cross multiply
   2,116,978.34x = 3,174,464.19 × 820,736.42
4. Step 4: Simplify right side
   2,116,978.34x = 2,605,398,374,718.80
5. Step 5: Solve for x
   x = 2,605,398,374,718.80/2,116,978.34
6. Step 6: Final answer
   x = 1,230,715.65