Finding the Third Proportional to 52,128.75 and 111,639

Step by Step Solution

1. Step 1: Write the proportion equation
   52,128.75 : 111,639 = 111,639 : x
2. Step 2: Convert to fraction form
   52,128.75/111,639 = 111,639/x
3. Step 3: Cross multiply
   52,128.75x = 111,639 × 111,639
4. Step 4: Simplify right side
   52,128.75x = 12,463,266,321
5. Step 5: Solve for x
   x = 12,463,266,321/52,128.75
6. Step 6: Final answer
   x = 239,086.23