Finding the Third Proportional to 315,429 and 691,924.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,429 : 691,924.50 = 691,924.50 : x
2. Step 2: Convert to fraction form
   315,429/691,924.50 = 691,924.50/x
3. Step 3: Cross multiply
   315,429x = 691,924.50 × 691,924.50
4. Step 4: Simplify right side
   315,429x = 478,759,513,700.25
5. Step 5: Solve for x
   x = 478,759,513,700.25/315,429
6. Step 6: Final answer
   x = 1,517,804.37