Finding the Fourth Proportional to 142,647.10, 213,850.22 and 89,940.40

Step by Step Solution

1. Step 1: Write the proportion equation
   142,647.10 : 213,850.22 = 89,940.40 : x
2. Step 2: Convert to fraction form
   142,647.10/213,850.22 = 89,940.40/x
3. Step 3: Cross multiply
   142,647.10x = 213,850.22 × 89,940.40
4. Step 4: Simplify right side
   142,647.10x = 19,233,774,326.89
5. Step 5: Solve for x
   x = 19,233,774,326.89/142,647.10
6. Step 6: Final answer
   x = 134,834.67