Finding the Fourth Proportional to 142,249.56, 213,300.80 and 52,269.31

Step by Step Solution

1. Step 1: Write the proportion equation
   142,249.56 : 213,300.80 = 52,269.31 : x
2. Step 2: Convert to fraction form
   142,249.56/213,300.80 = 52,269.31/x
3. Step 3: Cross multiply
   142,249.56x = 213,300.80 × 52,269.31
4. Step 4: Simplify right side
   142,249.56x = 11,149,085,638.45
5. Step 5: Solve for x
   x = 11,149,085,638.45/142,249.56
6. Step 6: Final answer
   x = 78,376.94