Finding the Third Proportional to 2,931.50 and 4,255.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,931.50 : 4,255.50 = 4,255.50 : x
2. Step 2: Convert to fraction form
   2,931.50/4,255.50 = 4,255.50/x
3. Step 3: Cross multiply
   2,931.50x = 4,255.50 × 4,255.50
4. Step 4: Simplify right side
   2,931.50x = 18,109,280.25
5. Step 5: Solve for x
   x = 18,109,280.25/2,931.50
6. Step 6: Final answer
   x = 6,177.48