Finding the Fourth Proportional to 1,705.61, 2,353.86 and 1,285.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,705.61 : 2,353.86 = 1,285.22 : x
2. Step 2: Convert to fraction form
   1,705.61/2,353.86 = 1,285.22/x
3. Step 3: Cross multiply
   1,705.61x = 2,353.86 × 1,285.22
4. Step 4: Simplify right side
   1,705.61x = 3,025,233.83
5. Step 5: Solve for x
   x = 3,025,233.83/1,705.61
6. Step 6: Final answer
   x = 1,773.69