Finding the Fourth Proportional to 30,911.76, 42,658.32 and 16,764.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,911.76 : 42,658.32 = 16,764.72 : x
2. Step 2: Convert to fraction form
   30,911.76/42,658.32 = 16,764.72/x
3. Step 3: Cross multiply
   30,911.76x = 42,658.32 × 16,764.72
4. Step 4: Simplify right side
   30,911.76x = 715,154,790.47
5. Step 5: Solve for x
   x = 715,154,790.47/30,911.76
6. Step 6: Final answer
   x = 23,135.36