Finding the Fourth Proportional to 1,583,456.55, 2,185,111.49 and 858,288.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,583,456.55 : 2,185,111.49 = 858,288.70 : x
2. Step 2: Convert to fraction form
   1,583,456.55/2,185,111.49 = 858,288.70/x
3. Step 3: Cross multiply
   1,583,456.55x = 2,185,111.49 × 858,288.70
4. Step 4: Simplify right side
   1,583,456.55x = 1,875,456,500,107.16
5. Step 5: Solve for x
   x = 1,875,456,500,107.16/1,583,456.55
6. Step 6: Final answer
   x = 1,184,406.67