Finding the Third Proportional to 366,918 and 561,319.50

Step by Step Solution

1. Step 1: Write the proportion equation
   366,918 : 561,319.50 = 561,319.50 : x
2. Step 2: Convert to fraction form
   366,918/561,319.50 = 561,319.50/x
3. Step 3: Cross multiply
   366,918x = 561,319.50 × 561,319.50
4. Step 4: Simplify right side
   366,918x = 315,079,581,080.25
5. Step 5: Solve for x
   x = 315,079,581,080.25/366,918
6. Step 6: Final answer
   x = 858,719.34