Finding the Third Proportional to 673,516.50 and 1,066,291.50

Step by Step Solution

1. Step 1: Write the proportion equation
   673,516.50 : 1,066,291.50 = 1,066,291.50 : x
2. Step 2: Convert to fraction form
   673,516.50/1,066,291.50 = 1,066,291.50/x
3. Step 3: Cross multiply
   673,516.50x = 1,066,291.50 × 1,066,291.50
4. Step 4: Simplify right side
   673,516.50x = 1,136,977,562,972.25
5. Step 5: Solve for x
   x = 1,136,977,562,972.25/673,516.50
6. Step 6: Final answer
   x = 1,688,121.32