Finding the Third Proportional to 1,432.69 and 3,138.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.69 : 3,138.75 = 3,138.75 : x
2. Step 2: Convert to fraction form
   1,432.69/3,138.75 = 3,138.75/x
3. Step 3: Cross multiply
   1,432.69x = 3,138.75 × 3,138.75
4. Step 4: Simplify right side
   1,432.69x = 9,851,751.56
5. Step 5: Solve for x
   x = 9,851,751.56/1,432.69
6. Step 6: Final answer
   x = 6,876.41