Finding the Fourth Proportional to 21,049.37, 31,557.50 and 10,513.95

Step by Step Solution

1. Step 1: Write the proportion equation
   21,049.37 : 31,557.50 = 10,513.95 : x
2. Step 2: Convert to fraction form
   21,049.37/31,557.50 = 10,513.95/x
3. Step 3: Cross multiply
   21,049.37x = 31,557.50 × 10,513.95
4. Step 4: Simplify right side
   21,049.37x = 331,793,924.56
5. Step 5: Solve for x
   x = 331,793,924.56/21,049.37
6. Step 6: Final answer
   x = 15,762.66