Finding the Third Proportional to 286,008 and 427,500

Step by Step Solution

1. Step 1: Write the proportion equation
   286,008 : 427,500 = 427,500 : x
2. Step 2: Convert to fraction form
   286,008/427,500 = 427,500/x
3. Step 3: Cross multiply
   286,008x = 427,500 × 427,500
4. Step 4: Simplify right side
   286,008x = 182,756,250,000
5. Step 5: Solve for x
   x = 182,756,250,000/286,008
6. Step 6: Final answer
   x = 638,989.99