Finding the Fourth Proportional to 2,640,220, 3,959,695.68 and 1,218,910.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640,220 : 3,959,695.68 = 1,218,910.56 : x
2. Step 2: Convert to fraction form
   2,640,220/3,959,695.68 = 1,218,910.56/x
3. Step 3: Cross multiply
   2,640,220x = 3,959,695.68 × 1,218,910.56
4. Step 4: Simplify right side
   2,640,220x = 4,826,514,878,738.38
5. Step 5: Solve for x
   x = 4,826,514,878,738.38/2,640,220
6. Step 6: Final answer
   x = 1,828,072.99