Finding the Fourth Proportional to 1,583,456.30, 2,185,111.15 and 858,288.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,583,456.30 : 2,185,111.15 = 858,288.45 : x
2. Step 2: Convert to fraction form
   1,583,456.30/2,185,111.15 = 858,288.45/x
3. Step 3: Cross multiply
   1,583,456.30x = 2,185,111.15 × 858,288.45
4. Step 4: Simplify right side
   1,583,456.30x = 1,875,455,662,011.22
5. Step 5: Solve for x
   x = 1,875,455,662,011.22/1,583,456.30
6. Step 6: Final answer
   x = 1,184,406.33