Finding the Third Proportional to 21,988.38 and 51,854.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,988.38 : 51,854.88 = 51,854.88 : x
2. Step 2: Convert to fraction form
   21,988.38/51,854.88 = 51,854.88/x
3. Step 3: Cross multiply
   21,988.38x = 51,854.88 × 51,854.88
4. Step 4: Simplify right side
   21,988.38x = 2,688,928,061.27
5. Step 5: Solve for x
   x = 2,688,928,061.27/21,988.38
6. Step 6: Final answer
   x = 122,288.62