Finding the Fourth Proportional to 2,826,215,942.98, 4,239,956,191.15 and 861,222,810.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,826,215,942.98 : 4,239,956,191.15 = 861,222,810.10 : x
2. Step 2: Convert to fraction form
   2,826,215,942.98/4,239,956,191.15 = 861,222,810.10/x
3. Step 3: Cross multiply
   2,826,215,942.98x = 4,239,956,191.15 × 861,222,810.10
4. Step 4: Simplify right side
   2,826,215,942.98x = 3,651,546,985,619,743,232
5. Step 5: Solve for x
   x = 3,651,546,985,619,743,232/2,826,215,942.98
6. Step 6: Final answer
   x = 1,292,026,886.59