Finding the Fourth Proportional to 19,854.72, 29,564.46 and 19,145.16

Step by Step Solution

1. Step 1: Write the proportion equation
   19,854.72 : 29,564.46 = 19,145.16 : x
2. Step 2: Convert to fraction form
   19,854.72/29,564.46 = 19,145.16/x
3. Step 3: Cross multiply
   19,854.72x = 29,564.46 × 19,145.16
4. Step 4: Simplify right side
   19,854.72x = 566,016,317.01
5. Step 5: Solve for x
   x = 566,016,317.01/19,854.72
6. Step 6: Final answer
   x = 28,507.90