Finding the Third Proportional to 189,915 and 300,727.50

Step by Step Solution

1. Step 1: Write the proportion equation
   189,915 : 300,727.50 = 300,727.50 : x
2. Step 2: Convert to fraction form
   189,915/300,727.50 = 300,727.50/x
3. Step 3: Cross multiply
   189,915x = 300,727.50 × 300,727.50
4. Step 4: Simplify right side
   189,915x = 90,437,029,256.25
5. Step 5: Solve for x
   x = 90,437,029,256.25/189,915
6. Step 6: Final answer
   x = 476,197.40