Finding the Third Proportional to 420,304.50 and 899,658

Step by Step Solution

1. Step 1: Write the proportion equation
   420,304.50 : 899,658 = 899,658 : x
2. Step 2: Convert to fraction form
   420,304.50/899,658 = 899,658/x
3. Step 3: Cross multiply
   420,304.50x = 899,658 × 899,658
4. Step 4: Simplify right side
   420,304.50x = 809,384,516,964
5. Step 5: Solve for x
   x = 809,384,516,964/420,304.50
6. Step 6: Final answer
   x = 1,925,709.85