Finding the Third Proportional to 278,731.50 and 611,598

Step by Step Solution

1. Step 1: Write the proportion equation
   278,731.50 : 611,598 = 611,598 : x
2. Step 2: Convert to fraction form
   278,731.50/611,598 = 611,598/x
3. Step 3: Cross multiply
   278,731.50x = 611,598 × 611,598
4. Step 4: Simplify right side
   278,731.50x = 374,052,113,604
5. Step 5: Solve for x
   x = 374,052,113,604/278,731.50
6. Step 6: Final answer
   x = 1,341,980.05