Finding the Third Proportional to 138,280.50 and 301,589

Step by Step Solution

1. Step 1: Write the proportion equation
   138,280.50 : 301,589 = 301,589 : x
2. Step 2: Convert to fraction form
   138,280.50/301,589 = 301,589/x
3. Step 3: Cross multiply
   138,280.50x = 301,589 × 301,589
4. Step 4: Simplify right side
   138,280.50x = 90,955,924,921
5. Step 5: Solve for x
   x = 90,955,924,921/138,280.50
6. Step 6: Final answer
   x = 657,763.93