Finding the Third Proportional to 1,384.50 and 2,118

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.50 : 2,118 = 2,118 : x
2. Step 2: Convert to fraction form
   1,384.50/2,118 = 2,118/x
3. Step 3: Cross multiply
   1,384.50x = 2,118 × 2,118
4. Step 4: Simplify right side
   1,384.50x = 4,485,924
5. Step 5: Solve for x
   x = 4,485,924/1,384.50
6. Step 6: Final answer
   x = 3,240.10