Finding the Third Proportional to 109,359 and 260,821.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,359 : 260,821.50 = 260,821.50 : x
2. Step 2: Convert to fraction form
   109,359/260,821.50 = 260,821.50/x
3. Step 3: Cross multiply
   109,359x = 260,821.50 × 260,821.50
4. Step 4: Simplify right side
   109,359x = 68,027,854,862.25
5. Step 5: Solve for x
   x = 68,027,854,862.25/109,359
6. Step 6: Final answer
   x = 622,059.96