Finding the Third Proportional to 267,112 and 399,820

Step by Step Solution

1. Step 1: Write the proportion equation
   267,112 : 399,820 = 399,820 : x
2. Step 2: Convert to fraction form
   267,112/399,820 = 399,820/x
3. Step 3: Cross multiply
   267,112x = 399,820 × 399,820
4. Step 4: Simplify right side
   267,112x = 159,856,032,400
5. Step 5: Solve for x
   x = 159,856,032,400/267,112
6. Step 6: Final answer
   x = 598,460.69