Finding the Fourth Proportional to 142,057.48, 213,109.34 and 53,317.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,057.48 : 213,109.34 = 53,317.96 : x
2. Step 2: Convert to fraction form
   142,057.48/213,109.34 = 53,317.96/x
3. Step 3: Cross multiply
   142,057.48x = 213,109.34 × 53,317.96
4. Step 4: Simplify right side
   142,057.48x = 11,362,555,265.75
5. Step 5: Solve for x
   x = 11,362,555,265.75/142,057.48
6. Step 6: Final answer
   x = 79,985.62