Finding the Third Proportional to 189,724.50 and 404,028

Step by Step Solution

1. Step 1: Write the proportion equation
   189,724.50 : 404,028 = 404,028 : x
2. Step 2: Convert to fraction form
   189,724.50/404,028 = 404,028/x
3. Step 3: Cross multiply
   189,724.50x = 404,028 × 404,028
4. Step 4: Simplify right side
   189,724.50x = 163,238,624,784
5. Step 5: Solve for x
   x = 163,238,624,784/189,724.50
6. Step 6: Final answer
   x = 860,398.23