Finding the Third Proportional to 261,231 and 390,833.50

Step by Step Solution

1. Step 1: Write the proportion equation
   261,231 : 390,833.50 = 390,833.50 : x
2. Step 2: Convert to fraction form
   261,231/390,833.50 = 390,833.50/x
3. Step 3: Cross multiply
   261,231x = 390,833.50 × 390,833.50
4. Step 4: Simplify right side
   261,231x = 152,750,824,722.25
5. Step 5: Solve for x
   x = 152,750,824,722.25/261,231
6. Step 6: Final answer
   x = 584,734.68