Finding the Third Proportional to 356,551.50 and 783,078

Step by Step Solution

1. Step 1: Write the proportion equation
   356,551.50 : 783,078 = 783,078 : x
2. Step 2: Convert to fraction form
   356,551.50/783,078 = 783,078/x
3. Step 3: Cross multiply
   356,551.50x = 783,078 × 783,078
4. Step 4: Simplify right side
   356,551.50x = 613,211,154,084
5. Step 5: Solve for x
   x = 613,211,154,084/356,551.50
6. Step 6: Final answer
   x = 1,719,838.94