Finding the Fourth Proportional to 12,911.01, 17,815.73 and 7,245

Step by Step Solution

1. Step 1: Write the proportion equation
   12,911.01 : 17,815.73 = 7,245 : x
2. Step 2: Convert to fraction form
   12,911.01/17,815.73 = 7,245/x
3. Step 3: Cross multiply
   12,911.01x = 17,815.73 × 7,245
4. Step 4: Simplify right side
   12,911.01x = 129,074,963.85
5. Step 5: Solve for x
   x = 129,074,963.85/12,911.01
6. Step 6: Final answer
   x = 9,997.28