Finding the Fourth Proportional to 1,961.61, 2,706.86 and 1,122.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,961.61 : 2,706.86 = 1,122.18 : x
2. Step 2: Convert to fraction form
   1,961.61/2,706.86 = 1,122.18/x
3. Step 3: Cross multiply
   1,961.61x = 2,706.86 × 1,122.18
4. Step 4: Simplify right side
   1,961.61x = 3,037,584.15
5. Step 5: Solve for x
   x = 3,037,584.15/1,961.61
6. Step 6: Final answer
   x = 1,548.52