Finding the Fourth Proportional to 13,025.72, 19,538.30 and 3,165.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,025.72 : 19,538.30 = 3,165.05 : x
2. Step 2: Convert to fraction form
   13,025.72/19,538.30 = 3,165.05/x
3. Step 3: Cross multiply
   13,025.72x = 19,538.30 × 3,165.05
4. Step 4: Simplify right side
   13,025.72x = 61,839,606.64
5. Step 5: Solve for x
   x = 61,839,606.64/13,025.72
6. Step 6: Final answer
   x = 4,747.50