Finding the Fourth Proportional to 1,994,196.55, 2,992,048.61 and 780,640.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,994,196.55 : 2,992,048.61 = 780,640.42 : x
2. Step 2: Convert to fraction form
   1,994,196.55/2,992,048.61 = 780,640.42/x
3. Step 3: Cross multiply
   1,994,196.55x = 2,992,048.61 × 780,640.42
4. Step 4: Simplify right side
   1,994,196.55x = 2,335,714,083,570.82
5. Step 5: Solve for x
   x = 2,335,714,083,570.82/1,994,196.55
6. Step 6: Final answer
   x = 1,171,255.70