Finding the Fourth Proportional to 21,127.32, 31,695.84 and 7,089.21

Step by Step Solution

1. Step 1: Write the proportion equation
   21,127.32 : 31,695.84 = 7,089.21 : x
2. Step 2: Convert to fraction form
   21,127.32/31,695.84 = 7,089.21/x
3. Step 3: Cross multiply
   21,127.32x = 31,695.84 × 7,089.21
4. Step 4: Simplify right side
   21,127.32x = 224,698,465.89
5. Step 5: Solve for x
   x = 224,698,465.89/21,127.32
6. Step 6: Final answer
   x = 10,635.45