Finding the Third Proportional to 288,239 and 458,019.50

Step by Step Solution

1. Step 1: Write the proportion equation
   288,239 : 458,019.50 = 458,019.50 : x
2. Step 2: Convert to fraction form
   288,239/458,019.50 = 458,019.50/x
3. Step 3: Cross multiply
   288,239x = 458,019.50 × 458,019.50
4. Step 4: Simplify right side
   288,239x = 209,781,862,380.25
5. Step 5: Solve for x
   x = 209,781,862,380.25/288,239
6. Step 6: Final answer
   x = 727,805.27