Finding the Fourth Proportional to 142,665.47, 213,997.69 and 42,825.23

Step by Step Solution

1. Step 1: Write the proportion equation
   142,665.47 : 213,997.69 = 42,825.23 : x
2. Step 2: Convert to fraction form
   142,665.47/213,997.69 = 42,825.23/x
3. Step 3: Cross multiply
   142,665.47x = 213,997.69 × 42,825.23
4. Step 4: Simplify right side
   142,665.47x = 9,164,500,293.72
5. Step 5: Solve for x
   x = 9,164,500,293.72/142,665.47
6. Step 6: Final answer
   x = 64,237.69