Finding the Third Proportional to 393,984 and 602,412.19

Step by Step Solution

1. Step 1: Write the proportion equation
   393,984 : 602,412.19 = 602,412.19 : x
2. Step 2: Convert to fraction form
   393,984/602,412.19 = 602,412.19/x
3. Step 3: Cross multiply
   393,984x = 602,412.19 × 602,412.19
4. Step 4: Simplify right side
   393,984x = 362,900,443,648.54
5. Step 5: Solve for x
   x = 362,900,443,648.54/393,984
6. Step 6: Final answer
   x = 921,104.52