Finding the Fourth Proportional to 20,756.58, 31,132.57 and 7,429.04

Step by Step Solution

1. Step 1: Write the proportion equation
   20,756.58 : 31,132.57 = 7,429.04 : x
2. Step 2: Convert to fraction form
   20,756.58/31,132.57 = 7,429.04/x
3. Step 3: Cross multiply
   20,756.58x = 31,132.57 × 7,429.04
4. Step 4: Simplify right side
   20,756.58x = 231,285,107.83
5. Step 5: Solve for x
   x = 231,285,107.83/20,756.58
6. Step 6: Final answer
   x = 11,142.74