Finding the Third Proportional to 215,088.75 and 315,025.88

Step by Step Solution

1. Step 1: Write the proportion equation
   215,088.75 : 315,025.88 = 315,025.88 : x
2. Step 2: Convert to fraction form
   215,088.75/315,025.88 = 315,025.88/x
3. Step 3: Cross multiply
   215,088.75x = 315,025.88 × 315,025.88
4. Step 4: Simplify right side
   215,088.75x = 99,241,301,919.52
5. Step 5: Solve for x
   x = 99,241,301,919.52/215,088.75
6. Step 6: Final answer
   x = 461,396.99