Finding the Third Proportional to 1,507.78 and 2,799.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,507.78 : 2,799.56 = 2,799.56 : x
2. Step 2: Convert to fraction form
   1,507.78/2,799.56 = 2,799.56/x
3. Step 3: Cross multiply
   1,507.78x = 2,799.56 × 2,799.56
4. Step 4: Simplify right side
   1,507.78x = 7,837,550.19
5. Step 5: Solve for x
   x = 7,837,550.19/1,507.78
6. Step 6: Final answer
   x = 5,198.07