Finding the Third Proportional to 362,328 and 521,890

Step by Step Solution

1. Step 1: Write the proportion equation
   362,328 : 521,890 = 521,890 : x
2. Step 2: Convert to fraction form
   362,328/521,890 = 521,890/x
3. Step 3: Cross multiply
   362,328x = 521,890 × 521,890
4. Step 4: Simplify right side
   362,328x = 272,369,172,100
5. Step 5: Solve for x
   x = 272,369,172,100/362,328
6. Step 6: Final answer
   x = 751,719.91