Finding the Fourth Proportional to 1,762.56, 2,640.96 and 1,111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,762.56 : 2,640.96 = 1,111.20 : x
2. Step 2: Convert to fraction form
   1,762.56/2,640.96 = 1,111.20/x
3. Step 3: Cross multiply
   1,762.56x = 2,640.96 × 1,111.20
4. Step 4: Simplify right side
   1,762.56x = 2,934,634.75
5. Step 5: Solve for x
   x = 2,934,634.75/1,762.56
6. Step 6: Final answer
   x = 1,664.98