Finding the Fourth Proportional to 21,011.94, 31,517.82 and 5,429.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,011.94 : 31,517.82 = 5,429.52 : x
2. Step 2: Convert to fraction form
   21,011.94/31,517.82 = 5,429.52/x
3. Step 3: Cross multiply
   21,011.94x = 31,517.82 × 5,429.52
4. Step 4: Simplify right side
   21,011.94x = 171,126,634.05
5. Step 5: Solve for x
   x = 171,126,634.05/21,011.94
6. Step 6: Final answer
   x = 8,144.26