Finding the Fourth Proportional to 1,961.31, 2,706.55 and 1,077.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,961.31 : 2,706.55 = 1,077.10 : x
2. Step 2: Convert to fraction form
   1,961.31/2,706.55 = 1,077.10/x
3. Step 3: Cross multiply
   1,961.31x = 2,706.55 × 1,077.10
4. Step 4: Simplify right side
   1,961.31x = 2,915,225.01
5. Step 5: Solve for x
   x = 2,915,225.01/1,961.31
6. Step 6: Final answer
   x = 1,486.37