Finding the Third Proportional to 653,624 and 900,078

Step by Step Solution

1. Step 1: Write the proportion equation
   653,624 : 900,078 = 900,078 : x
2. Step 2: Convert to fraction form
   653,624/900,078 = 900,078/x
3. Step 3: Cross multiply
   653,624x = 900,078 × 900,078
4. Step 4: Simplify right side
   653,624x = 810,140,406,084
5. Step 5: Solve for x
   x = 810,140,406,084/653,624
6. Step 6: Final answer
   x = 1,239,459.39