Finding the Fourth Proportional to 57,196.42, 85,793.42 and 15,643.42

Step by Step Solution

1. Step 1: Write the proportion equation
   57,196.42 : 85,793.42 = 15,643.42 : x
2. Step 2: Convert to fraction form
   57,196.42/85,793.42 = 15,643.42/x
3. Step 3: Cross multiply
   57,196.42x = 85,793.42 × 15,643.42
4. Step 4: Simplify right side
   57,196.42x = 1,342,102,502.30
5. Step 5: Solve for x
   x = 1,342,102,502.30/57,196.42
6. Step 6: Final answer
   x = 23,464.80