Finding the Third Proportional to 386,158.50 and 830,430

Step by Step Solution

1. Step 1: Write the proportion equation
   386,158.50 : 830,430 = 830,430 : x
2. Step 2: Convert to fraction form
   386,158.50/830,430 = 830,430/x
3. Step 3: Cross multiply
   386,158.50x = 830,430 × 830,430
4. Step 4: Simplify right side
   386,158.50x = 689,613,984,900
5. Step 5: Solve for x
   x = 689,613,984,900/386,158.50
6. Step 6: Final answer
   x = 1,785,831.43