Finding the Third Proportional to 284,199 and 621,889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   284,199 : 621,889.50 = 621,889.50 : x
2. Step 2: Convert to fraction form
   284,199/621,889.50 = 621,889.50/x
3. Step 3: Cross multiply
   284,199x = 621,889.50 × 621,889.50
4. Step 4: Simplify right side
   284,199x = 386,746,550,210.25
5. Step 5: Solve for x
   x = 386,746,550,210.25/284,199
6. Step 6: Final answer
   x = 1,360,830.09