Finding the Third Proportional to 402,103.50 and 612,589

Step by Step Solution

1. Step 1: Write the proportion equation
   402,103.50 : 612,589 = 612,589 : x
2. Step 2: Convert to fraction form
   402,103.50/612,589 = 612,589/x
3. Step 3: Cross multiply
   402,103.50x = 612,589 × 612,589
4. Step 4: Simplify right side
   402,103.50x = 375,265,282,921
5. Step 5: Solve for x
   x = 375,265,282,921/402,103.50
6. Step 6: Final answer
   x = 933,255.45