Finding the Fourth Proportional to 2,653,006.76, 3,980,078.78 and 855,993

Step by Step Solution

1. Step 1: Write the proportion equation
   2,653,006.76 : 3,980,078.78 = 855,993 : x
2. Step 2: Convert to fraction form
   2,653,006.76/3,980,078.78 = 855,993/x
3. Step 3: Cross multiply
   2,653,006.76x = 3,980,078.78 × 855,993
4. Step 4: Simplify right side
   2,653,006.76x = 3,406,919,575,128.54
5. Step 5: Solve for x
   x = 3,406,919,575,128.54/2,653,006.76
6. Step 6: Final answer
   x = 1,284,172.97