Finding the Third Proportional to 262,428.50 and 393,574

Step by Step Solution

1. Step 1: Write the proportion equation
   262,428.50 : 393,574 = 393,574 : x
2. Step 2: Convert to fraction form
   262,428.50/393,574 = 393,574/x
3. Step 3: Cross multiply
   262,428.50x = 393,574 × 393,574
4. Step 4: Simplify right side
   262,428.50x = 154,900,493,476
5. Step 5: Solve for x
   x = 154,900,493,476/262,428.50
6. Step 6: Final answer
   x = 590,257.89