Finding the Third Proportional to 1,978.17 and 3,223.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.17 : 3,223.55 = 3,223.55 : x
2. Step 2: Convert to fraction form
   1,978.17/3,223.55 = 3,223.55/x
3. Step 3: Cross multiply
   1,978.17x = 3,223.55 × 3,223.55
4. Step 4: Simplify right side
   1,978.17x = 10,391,254.46
5. Step 5: Solve for x
   x = 10,391,254.46/1,978.17
6. Step 6: Final answer
   x = 5,252.96