Finding the Fourth Proportional to 42,357.78, 63,535.59 and 11,193.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,357.78 : 63,535.59 = 11,193.30 : x
2. Step 2: Convert to fraction form
   42,357.78/63,535.59 = 11,193.30/x
3. Step 3: Cross multiply
   42,357.78x = 63,535.59 × 11,193.30
4. Step 4: Simplify right side
   42,357.78x = 711,172,919.55
5. Step 5: Solve for x
   x = 711,172,919.55/42,357.78
6. Step 6: Final answer
   x = 16,789.66