Finding the Third Proportional to 386,358 and 591,012

Step by Step Solution

1. Step 1: Write the proportion equation
   386,358 : 591,012 = 591,012 : x
2. Step 2: Convert to fraction form
   386,358/591,012 = 591,012/x
3. Step 3: Cross multiply
   386,358x = 591,012 × 591,012
4. Step 4: Simplify right side
   386,358x = 349,295,184,144
5. Step 5: Solve for x
   x = 349,295,184,144/386,358
6. Step 6: Final answer
   x = 904,071.31