Finding the Third Proportional to 288,156 and 462,990

Step by Step Solution

1. Step 1: Write the proportion equation
   288,156 : 462,990 = 462,990 : x
2. Step 2: Convert to fraction form
   288,156/462,990 = 462,990/x
3. Step 3: Cross multiply
   288,156x = 462,990 × 462,990
4. Step 4: Simplify right side
   288,156x = 214,359,740,100
5. Step 5: Solve for x
   x = 214,359,740,100/288,156
6. Step 6: Final answer
   x = 743,901.71