Finding the Third Proportional to 290,281.50 and 615,798

Step by Step Solution

1. Step 1: Write the proportion equation
   290,281.50 : 615,798 = 615,798 : x
2. Step 2: Convert to fraction form
   290,281.50/615,798 = 615,798/x
3. Step 3: Cross multiply
   290,281.50x = 615,798 × 615,798
4. Step 4: Simplify right side
   290,281.50x = 379,207,176,804
5. Step 5: Solve for x
   x = 379,207,176,804/290,281.50
6. Step 6: Final answer
   x = 1,306,342.90