Finding the Fourth Proportional to 2,386,659.28, 3,578,879 and 869,285.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386,659.28 : 3,578,879 = 869,285.88 : x
2. Step 2: Convert to fraction form
   2,386,659.28/3,578,879 = 869,285.88/x
3. Step 3: Cross multiply
   2,386,659.28x = 3,578,879 × 869,285.88
4. Step 4: Simplify right side
   2,386,659.28x = 3,111,068,980,928.52
5. Step 5: Solve for x
   x = 3,111,068,980,928.52/2,386,659.28
6. Step 6: Final answer
   x = 1,303,524.56