Finding the Fourth Proportional to 142,407.72, 213,564.60 and 52,429.68

Step by Step Solution

1. Step 1: Write the proportion equation
   142,407.72 : 213,564.60 = 52,429.68 : x
2. Step 2: Convert to fraction form
   142,407.72/213,564.60 = 52,429.68/x
3. Step 3: Cross multiply
   142,407.72x = 213,564.60 × 52,429.68
4. Step 4: Simplify right side
   142,407.72x = 11,197,123,637.33
5. Step 5: Solve for x
   x = 11,197,123,637.33/142,407.72
6. Step 6: Final answer
   x = 78,627.22