Finding the Third Proportional to 539,217 and 803,641.50

Step by Step Solution

1. Step 1: Write the proportion equation
   539,217 : 803,641.50 = 803,641.50 : x
2. Step 2: Convert to fraction form
   539,217/803,641.50 = 803,641.50/x
3. Step 3: Cross multiply
   539,217x = 803,641.50 × 803,641.50
4. Step 4: Simplify right side
   539,217x = 645,839,660,522.25
5. Step 5: Solve for x
   x = 645,839,660,522.25/539,217
6. Step 6: Final answer
   x = 1,197,736.09