Finding the Third Proportional to 386,788 and 591,630

Step by Step Solution

1. Step 1: Write the proportion equation
   386,788 : 591,630 = 591,630 : x
2. Step 2: Convert to fraction form
   386,788/591,630 = 591,630/x
3. Step 3: Cross multiply
   386,788x = 591,630 × 591,630
4. Step 4: Simplify right side
   386,788x = 350,026,056,900
5. Step 5: Solve for x
   x = 350,026,056,900/386,788
6. Step 6: Final answer
   x = 904,955.83