Finding the Third Proportional to 131,769 and 318,487.50

Step by Step Solution

1. Step 1: Write the proportion equation
   131,769 : 318,487.50 = 318,487.50 : x
2. Step 2: Convert to fraction form
   131,769/318,487.50 = 318,487.50/x
3. Step 3: Cross multiply
   131,769x = 318,487.50 × 318,487.50
4. Step 4: Simplify right side
   131,769x = 101,434,287,656.25
5. Step 5: Solve for x
   x = 101,434,287,656.25/131,769
6. Step 6: Final answer
   x = 769,788.70