Finding the Fourth Proportional to 1,961.72, 2,707.17 and 1,077.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,961.72 : 2,707.17 = 1,077.50 : x
2. Step 2: Convert to fraction form
   1,961.72/2,707.17 = 1,077.50/x
3. Step 3: Cross multiply
   1,961.72x = 2,707.17 × 1,077.50
4. Step 4: Simplify right side
   1,961.72x = 2,916,984.46
5. Step 5: Solve for x
   x = 2,916,984.46/1,961.72
6. Step 6: Final answer
   x = 1,486.95