Finding the Fourth Proportional to 284,863.86, 393,105.42 and 157,536.72

Step by Step Solution

1. Step 1: Write the proportion equation
   284,863.86 : 393,105.42 = 157,536.72 : x
2. Step 2: Convert to fraction form
   284,863.86/393,105.42 = 157,536.72/x
3. Step 3: Cross multiply
   284,863.86x = 393,105.42 × 157,536.72
4. Step 4: Simplify right side
   284,863.86x = 61,928,538,481.02
5. Step 5: Solve for x
   x = 61,928,538,481.02/284,863.86
6. Step 6: Final answer
   x = 217,396.96