Finding the Third Proportional to 302,899.50 and 625,509

Step by Step Solution

1. Step 1: Write the proportion equation
   302,899.50 : 625,509 = 625,509 : x
2. Step 2: Convert to fraction form
   302,899.50/625,509 = 625,509/x
3. Step 3: Cross multiply
   302,899.50x = 625,509 × 625,509
4. Step 4: Simplify right side
   302,899.50x = 391,261,509,081
5. Step 5: Solve for x
   x = 391,261,509,081/302,899.50
6. Step 6: Final answer
   x = 1,291,720.55