Finding the Fourth Proportional to 142,311.47, 213,024.33 and 89,610.23

Step by Step Solution

1. Step 1: Write the proportion equation
   142,311.47 : 213,024.33 = 89,610.23 : x
2. Step 2: Convert to fraction form
   142,311.47/213,024.33 = 89,610.23/x
3. Step 3: Cross multiply
   142,311.47x = 213,024.33 × 89,610.23
4. Step 4: Simplify right side
   142,311.47x = 19,089,159,739.46
5. Step 5: Solve for x
   x = 19,089,159,739.46/142,311.47
6. Step 6: Final answer
   x = 134,136.49