Finding the Third Proportional to 386,581.50 and 784,035

Step by Step Solution

1. Step 1: Write the proportion equation
   386,581.50 : 784,035 = 784,035 : x
2. Step 2: Convert to fraction form
   386,581.50/784,035 = 784,035/x
3. Step 3: Cross multiply
   386,581.50x = 784,035 × 784,035
4. Step 4: Simplify right side
   386,581.50x = 614,710,881,225
5. Step 5: Solve for x
   x = 614,710,881,225/386,581.50
6. Step 6: Final answer
   x = 1,590,119.76