Finding the Fourth Proportional to 142,061.18, 213,036.37 and 53,266.30

Step by Step Solution

1. Step 1: Write the proportion equation
   142,061.18 : 213,036.37 = 53,266.30 : x
2. Step 2: Convert to fraction form
   142,061.18/213,036.37 = 53,266.30/x
3. Step 3: Cross multiply
   142,061.18x = 213,036.37 × 53,266.30
4. Step 4: Simplify right side
   142,061.18x = 11,347,659,195.33
5. Step 5: Solve for x
   x = 11,347,659,195.33/142,061.18
6. Step 6: Final answer
   x = 79,878.68