Finding the Fourth Proportional to 142,642.90, 213,624.74 and 82,544.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,642.90 : 213,624.74 = 82,544.69 : x
2. Step 2: Convert to fraction form
   142,642.90/213,624.74 = 82,544.69/x
3. Step 3: Cross multiply
   142,642.90x = 213,624.74 × 82,544.69
4. Step 4: Simplify right side
   142,642.90x = 17,633,587,077.87
5. Step 5: Solve for x
   x = 17,633,587,077.87/142,642.90
6. Step 6: Final answer
   x = 123,620.50