Finding the Third Proportional to 1,131 and 1,718.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131 : 1,718.50 = 1,718.50 : x
2. Step 2: Convert to fraction form
   1,131/1,718.50 = 1,718.50/x
3. Step 3: Cross multiply
   1,131x = 1,718.50 × 1,718.50
4. Step 4: Simplify right side
   1,131x = 2,953,242.25
5. Step 5: Solve for x
   x = 2,953,242.25/1,131
6. Step 6: Final answer
   x = 2,611.18