Finding the Fourth Proportional to 2,456,404.80, 3,684,607.20 and 858,801.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456,404.80 : 3,684,607.20 = 858,801.30 : x
2. Step 2: Convert to fraction form
   2,456,404.80/3,684,607.20 = 858,801.30/x
3. Step 3: Cross multiply
   2,456,404.80x = 3,684,607.20 × 858,801.30
4. Step 4: Simplify right side
   2,456,404.80x = 3,164,345,453,349.36
5. Step 5: Solve for x
   x = 3,164,345,453,349.36/2,456,404.80
6. Step 6: Final answer
   x = 1,288,201.95