Finding the Third Proportional to 65,810.25 and 142,128.38

Step by Step Solution

1. Step 1: Write the proportion equation
   65,810.25 : 142,128.38 = 142,128.38 : x
2. Step 2: Convert to fraction form
   65,810.25/142,128.38 = 142,128.38/x
3. Step 3: Cross multiply
   65,810.25x = 142,128.38 × 142,128.38
4. Step 4: Simplify right side
   65,810.25x = 20,200,474,980.14
5. Step 5: Solve for x
   x = 20,200,474,980.14/65,810.25
6. Step 6: Final answer
   x = 306,950.28