Finding the Third Proportional to 21,915.56 and 51,143.91

Step by Step Solution

1. Step 1: Write the proportion equation
   21,915.56 : 51,143.91 = 51,143.91 : x
2. Step 2: Convert to fraction form
   21,915.56/51,143.91 = 51,143.91/x
3. Step 3: Cross multiply
   21,915.56x = 51,143.91 × 51,143.91
4. Step 4: Simplify right side
   21,915.56x = 2,615,699,146.51
5. Step 5: Solve for x
   x = 2,615,699,146.51/21,915.56
6. Step 6: Final answer
   x = 119,353.50