Finding the Third Proportional to 1,317 and 2,784.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317 : 2,784.50 = 2,784.50 : x
2. Step 2: Convert to fraction form
   1,317/2,784.50 = 2,784.50/x
3. Step 3: Cross multiply
   1,317x = 2,784.50 × 2,784.50
4. Step 4: Simplify right side
   1,317x = 7,753,440.25
5. Step 5: Solve for x
   x = 7,753,440.25/1,317
6. Step 6: Final answer
   x = 5,887.20