Finding the Fourth Proportional to 1,560.02, 2,152.83 and 861.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,560.02 : 2,152.83 = 861.41 : x
2. Step 2: Convert to fraction form
   1,560.02/2,152.83 = 861.41/x
3. Step 3: Cross multiply
   1,560.02x = 2,152.83 × 861.41
4. Step 4: Simplify right side
   1,560.02x = 1,854,469.29
5. Step 5: Solve for x
   x = 1,854,469.29/1,560.02
6. Step 6: Final answer
   x = 1,188.75