Finding the Fourth Proportional to 142,641.10, 213,841.23 and 89,934.40

Step by Step Solution

1. Step 1: Write the proportion equation
   142,641.10 : 213,841.23 = 89,934.40 : x
2. Step 2: Convert to fraction form
   142,641.10/213,841.23 = 89,934.40/x
3. Step 3: Cross multiply
   142,641.10x = 213,841.23 × 89,934.40
4. Step 4: Simplify right side
   142,641.10x = 19,231,682,715.31
5. Step 5: Solve for x
   x = 19,231,682,715.31/142,641.10
6. Step 6: Final answer
   x = 134,825.68