Finding the Third Proportional to 1,380.38 and 2,988.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.38 : 2,988.56 = 2,988.56 : x
2. Step 2: Convert to fraction form
   1,380.38/2,988.56 = 2,988.56/x
3. Step 3: Cross multiply
   1,380.38x = 2,988.56 × 2,988.56
4. Step 4: Simplify right side
   1,380.38x = 8,931,505.82
5. Step 5: Solve for x
   x = 8,931,505.82/1,380.38
6. Step 6: Final answer
   x = 6,470.35