Finding the Third Proportional to 518,349 and 846,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   518,349 : 846,421.50 = 846,421.50 : x
2. Step 2: Convert to fraction form
   518,349/846,421.50 = 846,421.50/x
3. Step 3: Cross multiply
   518,349x = 846,421.50 × 846,421.50
4. Step 4: Simplify right side
   518,349x = 716,429,355,662.25
5. Step 5: Solve for x
   x = 716,429,355,662.25/518,349
6. Step 6: Final answer
   x = 1,382,137.05