Finding the Third Proportional to 28,218.38 and 40,221.56

Step by Step Solution

1. Step 1: Write the proportion equation
   28,218.38 : 40,221.56 = 40,221.56 : x
2. Step 2: Convert to fraction form
   28,218.38/40,221.56 = 40,221.56/x
3. Step 3: Cross multiply
   28,218.38x = 40,221.56 × 40,221.56
4. Step 4: Simplify right side
   28,218.38x = 1,617,774,089.94
5. Step 5: Solve for x
   x = 1,617,774,089.94/28,218.38
6. Step 6: Final answer
   x = 57,330.52