Finding the Third Proportional to 215,635 and 313,410.50

Step by Step Solution

1. Step 1: Write the proportion equation
   215,635 : 313,410.50 = 313,410.50 : x
2. Step 2: Convert to fraction form
   215,635/313,410.50 = 313,410.50/x
3. Step 3: Cross multiply
   215,635x = 313,410.50 × 313,410.50
4. Step 4: Simplify right side
   215,635x = 98,226,141,510.25
5. Step 5: Solve for x
   x = 98,226,141,510.25/215,635
6. Step 6: Final answer
   x = 455,520.40