Finding the Third Proportional to 260,428.50 and 570,711

Step by Step Solution

1. Step 1: Write the proportion equation
   260,428.50 : 570,711 = 570,711 : x
2. Step 2: Convert to fraction form
   260,428.50/570,711 = 570,711/x
3. Step 3: Cross multiply
   260,428.50x = 570,711 × 570,711
4. Step 4: Simplify right side
   260,428.50x = 325,711,045,521
5. Step 5: Solve for x
   x = 325,711,045,521/260,428.50
6. Step 6: Final answer
   x = 1,250,673.58