Finding the Fourth Proportional to 2,185,443.32, 3,015,899.34 and 1,218,585.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185,443.32 : 3,015,899.34 = 1,218,585.20 : x
2. Step 2: Convert to fraction form
   2,185,443.32/3,015,899.34 = 1,218,585.20/x
3. Step 3: Cross multiply
   2,185,443.32x = 3,015,899.34 × 1,218,585.20
4. Step 4: Simplify right side
   2,185,443.32x = 3,675,130,300,413.77
5. Step 5: Solve for x
   x = 3,675,130,300,413.77/2,185,443.32
6. Step 6: Final answer
   x = 1,681,640.64