Finding the Third Proportional to 392,536 and 622,573.50

Step by Step Solution

1. Step 1: Write the proportion equation
   392,536 : 622,573.50 = 622,573.50 : x
2. Step 2: Convert to fraction form
   392,536/622,573.50 = 622,573.50/x
3. Step 3: Cross multiply
   392,536x = 622,573.50 × 622,573.50
4. Step 4: Simplify right side
   392,536x = 387,597,762,902.25
5. Step 5: Solve for x
   x = 387,597,762,902.25/392,536
6. Step 6: Final answer
   x = 987,419.66