Finding the Third Proportional to 342,399 and 824,869.50

Step by Step Solution

1. Step 1: Write the proportion equation
   342,399 : 824,869.50 = 824,869.50 : x
2. Step 2: Convert to fraction form
   342,399/824,869.50 = 824,869.50/x
3. Step 3: Cross multiply
   342,399x = 824,869.50 × 824,869.50
4. Step 4: Simplify right side
   342,399x = 680,409,692,030.25
5. Step 5: Solve for x
   x = 680,409,692,030.25/342,399
6. Step 6: Final answer
   x = 1,987,183.64