Finding the Fourth Proportional to 1,927.50, 2,660.31 and 1,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,927.50 : 2,660.31 = 1,099.50 : x
2. Step 2: Convert to fraction form
   1,927.50/2,660.31 = 1,099.50/x
3. Step 3: Cross multiply
   1,927.50x = 2,660.31 × 1,099.50
4. Step 4: Simplify right side
   1,927.50x = 2,925,010.85
5. Step 5: Solve for x
   x = 2,925,010.85/1,927.50
6. Step 6: Final answer
   x = 1,517.52