Finding the Third Proportional to 478,758 and 728,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   478,758 : 728,086.50 = 728,086.50 : x
2. Step 2: Convert to fraction form
   478,758/728,086.50 = 728,086.50/x
3. Step 3: Cross multiply
   478,758x = 728,086.50 × 728,086.50
4. Step 4: Simplify right side
   478,758x = 530,109,951,482.25
5. Step 5: Solve for x
   x = 530,109,951,482.25/478,758
6. Step 6: Final answer
   x = 1,107,260.77