Finding the Third Proportional to 290,263.50 and 615,762

Step by Step Solution

1. Step 1: Write the proportion equation
   290,263.50 : 615,762 = 615,762 : x
2. Step 2: Convert to fraction form
   290,263.50/615,762 = 615,762/x
3. Step 3: Cross multiply
   290,263.50x = 615,762 × 615,762
4. Step 4: Simplify right side
   290,263.50x = 379,162,840,644
5. Step 5: Solve for x
   x = 379,162,840,644/290,263.50
6. Step 6: Final answer
   x = 1,306,271.17