Finding the Third Proportional to 399,984 and 874,792.50

Step by Step Solution

1. Step 1: Write the proportion equation
   399,984 : 874,792.50 = 874,792.50 : x
2. Step 2: Convert to fraction form
   399,984/874,792.50 = 874,792.50/x
3. Step 3: Cross multiply
   399,984x = 874,792.50 × 874,792.50
4. Step 4: Simplify right side
   399,984x = 765,261,918,056.25
5. Step 5: Solve for x
   x = 765,261,918,056.25/399,984
6. Step 6: Final answer
   x = 1,913,231.32