Finding the Third Proportional to 386,397 and 591,079.50

Step by Step Solution

1. Step 1: Write the proportion equation
   386,397 : 591,079.50 = 591,079.50 : x
2. Step 2: Convert to fraction form
   386,397/591,079.50 = 591,079.50/x
3. Step 3: Cross multiply
   386,397x = 591,079.50 × 591,079.50
4. Step 4: Simplify right side
   386,397x = 349,374,975,320.25
5. Step 5: Solve for x
   x = 349,374,975,320.25/386,397
6. Step 6: Final answer
   x = 904,186.56