Finding the Fourth Proportional to 31,176.16, 43,007.04 and 21,105.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,176.16 : 43,007.04 = 21,105.04 : x
2. Step 2: Convert to fraction form
   31,176.16/43,007.04 = 21,105.04/x
3. Step 3: Cross multiply
   31,176.16x = 43,007.04 × 21,105.04
4. Step 4: Simplify right side
   31,176.16x = 907,665,299.48
5. Step 5: Solve for x
   x = 907,665,299.48/31,176.16
6. Step 6: Final answer
   x = 29,114.08