Finding the Fourth Proportional to 2,128,285.93, 3,189,656.54 and 864,636.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,285.93 : 3,189,656.54 = 864,636.25 : x
2. Step 2: Convert to fraction form
   2,128,285.93/3,189,656.54 = 864,636.25/x
3. Step 3: Cross multiply
   2,128,285.93x = 3,189,656.54 × 864,636.25
4. Step 4: Simplify right side
   2,128,285.93x = 2,757,892,665,210.39
5. Step 5: Solve for x
   x = 2,757,892,665,210.39/2,128,285.93
6. Step 6: Final answer
   x = 1,295,828.08