Finding the Third Proportional to 400,745 and 599,861.50

Step by Step Solution

1. Step 1: Write the proportion equation
   400,745 : 599,861.50 = 599,861.50 : x
2. Step 2: Convert to fraction form
   400,745/599,861.50 = 599,861.50/x
3. Step 3: Cross multiply
   400,745x = 599,861.50 × 599,861.50
4. Step 4: Simplify right side
   400,745x = 359,833,819,182.25
5. Step 5: Solve for x
   x = 359,833,819,182.25/400,745
6. Step 6: Final answer
   x = 897,912.19