Finding the Third Proportional to 108,426 and 260,886.50

Step by Step Solution

1. Step 1: Write the proportion equation
   108,426 : 260,886.50 = 260,886.50 : x
2. Step 2: Convert to fraction form
   108,426/260,886.50 = 260,886.50/x
3. Step 3: Cross multiply
   108,426x = 260,886.50 × 260,886.50
4. Step 4: Simplify right side
   108,426x = 68,061,765,882.25
5. Step 5: Solve for x
   x = 68,061,765,882.25/108,426
6. Step 6: Final answer
   x = 627,725.51