Finding the Third Proportional to 686,617 and 1,005,345.50

Step by Step Solution

1. Step 1: Write the proportion equation
   686,617 : 1,005,345.50 = 1,005,345.50 : x
2. Step 2: Convert to fraction form
   686,617/1,005,345.50 = 1,005,345.50/x
3. Step 3: Cross multiply
   686,617x = 1,005,345.50 × 1,005,345.50
4. Step 4: Simplify right side
   686,617x = 1,010,719,574,370.25
5. Step 5: Solve for x
   x = 1,010,719,574,370.25/686,617
6. Step 6: Final answer
   x = 1,472,028.18