Finding the Third Proportional to 1,402.88 and 3,078.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.88 : 3,078.56 = 3,078.56 : x
2. Step 2: Convert to fraction form
   1,402.88/3,078.56 = 3,078.56/x
3. Step 3: Cross multiply
   1,402.88x = 3,078.56 × 3,078.56
4. Step 4: Simplify right side
   1,402.88x = 9,477,547.07
5. Step 5: Solve for x
   x = 9,477,547.07/1,402.88
6. Step 6: Final answer
   x = 6,755.80