Finding the Third Proportional to 386,340 and 591,031.50

Step by Step Solution

1. Step 1: Write the proportion equation
   386,340 : 591,031.50 = 591,031.50 : x
2. Step 2: Convert to fraction form
   386,340/591,031.50 = 591,031.50/x
3. Step 3: Cross multiply
   386,340x = 591,031.50 × 591,031.50
4. Step 4: Simplify right side
   386,340x = 349,318,233,992.25
5. Step 5: Solve for x
   x = 349,318,233,992.25/386,340
6. Step 6: Final answer
   x = 904,173.10