Finding the Fourth Proportional to 2,661,256.04, 3,991,883.64 and 639,499.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661,256.04 : 3,991,883.64 = 639,499.96 : x
2. Step 2: Convert to fraction form
   2,661,256.04/3,991,883.64 = 639,499.96/x
3. Step 3: Cross multiply
   2,661,256.04x = 3,991,883.64 × 639,499.96
4. Step 4: Simplify right side
   2,661,256.04x = 2,552,809,428,104.65
5. Step 5: Solve for x
   x = 2,552,809,428,104.65/2,661,256.04
6. Step 6: Final answer
   x = 959,249.84