Finding the Third Proportional to 243,621 and 586,905.75

Step by Step Solution

1. Step 1: Write the proportion equation
   243,621 : 586,905.75 = 586,905.75 : x
2. Step 2: Convert to fraction form
   243,621/586,905.75 = 586,905.75/x
3. Step 3: Cross multiply
   243,621x = 586,905.75 × 586,905.75
4. Step 4: Simplify right side
   243,621x = 344,458,359,383.06
5. Step 5: Solve for x
   x = 344,458,359,383.06/243,621
6. Step 6: Final answer
   x = 1,413,910.79