Finding the Third Proportional to 215,025.38 and 300,748.88

Step by Step Solution

1. Step 1: Write the proportion equation
   215,025.38 : 300,748.88 = 300,748.88 : x
2. Step 2: Convert to fraction form
   215,025.38/300,748.88 = 300,748.88/x
3. Step 3: Cross multiply
   215,025.38x = 300,748.88 × 300,748.88
4. Step 4: Simplify right side
   215,025.38x = 90,449,885,813.77
5. Step 5: Solve for x
   x = 90,449,885,813.77/215,025.38
6. Step 6: Final answer
   x = 420,647.50