Finding the Third Proportional to 286,986 and 625,642.50

Step by Step Solution

1. Step 1: Write the proportion equation
   286,986 : 625,642.50 = 625,642.50 : x
2. Step 2: Convert to fraction form
   286,986/625,642.50 = 625,642.50/x
3. Step 3: Cross multiply
   286,986x = 625,642.50 × 625,642.50
4. Step 4: Simplify right side
   286,986x = 391,428,537,806.25
5. Step 5: Solve for x
   x = 391,428,537,806.25/286,986
6. Step 6: Final answer
   x = 1,363,929.03