Finding the Third Proportional to 286,459.50 and 630,120

Step by Step Solution

1. Step 1: Write the proportion equation
   286,459.50 : 630,120 = 630,120 : x
2. Step 2: Convert to fraction form
   286,459.50/630,120 = 630,120/x
3. Step 3: Cross multiply
   286,459.50x = 630,120 × 630,120
4. Step 4: Simplify right side
   286,459.50x = 397,051,214,400
5. Step 5: Solve for x
   x = 397,051,214,400/286,459.50
6. Step 6: Final answer
   x = 1,386,064.05