Finding the Fourth Proportional to 21,185.96, 31,758.26 and 10,089.64

Step by Step Solution

1. Step 1: Write the proportion equation
   21,185.96 : 31,758.26 = 10,089.64 : x
2. Step 2: Convert to fraction form
   21,185.96/31,758.26 = 10,089.64/x
3. Step 3: Cross multiply
   21,185.96x = 31,758.26 × 10,089.64
4. Step 4: Simplify right side
   21,185.96x = 320,429,410.43
5. Step 5: Solve for x
   x = 320,429,410.43/21,185.96
6. Step 6: Final answer
   x = 15,124.61