Finding the Fourth Proportional to 13,025.16, 19,538.82 and 7,185.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,025.16 : 19,538.82 = 7,185.78 : x
2. Step 2: Convert to fraction form
   13,025.16/19,538.82 = 7,185.78/x
3. Step 3: Cross multiply
   13,025.16x = 19,538.82 × 7,185.78
4. Step 4: Simplify right side
   13,025.16x = 140,401,661.98
5. Step 5: Solve for x
   x = 140,401,661.98/13,025.16
6. Step 6: Final answer
   x = 10,779.27