Finding the Third Proportional to 21,402 and 51,559.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,402 : 51,559.50 = 51,559.50 : x
2. Step 2: Convert to fraction form
   21,402/51,559.50 = 51,559.50/x
3. Step 3: Cross multiply
   21,402x = 51,559.50 × 51,559.50
4. Step 4: Simplify right side
   21,402x = 2,658,382,040.25
5. Step 5: Solve for x
   x = 2,658,382,040.25/21,402
6. Step 6: Final answer
   x = 124,211.85