Finding the Third Proportional to 572,398.50 and 890,109

Step by Step Solution

1. Step 1: Write the proportion equation
   572,398.50 : 890,109 = 890,109 : x
2. Step 2: Convert to fraction form
   572,398.50/890,109 = 890,109/x
3. Step 3: Cross multiply
   572,398.50x = 890,109 × 890,109
4. Step 4: Simplify right side
   572,398.50x = 792,294,031,881
5. Step 5: Solve for x
   x = 792,294,031,881/572,398.50
6. Step 6: Final answer
   x = 1,384,165.11