Finding the Third Proportional to 402,308 and 607,564

Step by Step Solution

1. Step 1: Write the proportion equation
   402,308 : 607,564 = 607,564 : x
2. Step 2: Convert to fraction form
   402,308/607,564 = 607,564/x
3. Step 3: Cross multiply
   402,308x = 607,564 × 607,564
4. Step 4: Simplify right side
   402,308x = 369,134,014,096
5. Step 5: Solve for x
   x = 369,134,014,096/402,308
6. Step 6: Final answer
   x = 917,540.82