Finding the Third Proportional to 238,180 and 521,000

Step by Step Solution

1. Step 1: Write the proportion equation
   238,180 : 521,000 = 521,000 : x
2. Step 2: Convert to fraction form
   238,180/521,000 = 521,000/x
3. Step 3: Cross multiply
   238,180x = 521,000 × 521,000
4. Step 4: Simplify right side
   238,180x = 271,441,000,000
5. Step 5: Solve for x
   x = 271,441,000,000/238,180
6. Step 6: Final answer
   x = 1,139,646.49