Finding the Fourth Proportional to 13,113.42, 18,095.83 and 7,145.07

Step by Step Solution

1. Step 1: Write the proportion equation
   13,113.42 : 18,095.83 = 7,145.07 : x
2. Step 2: Convert to fraction form
   13,113.42/18,095.83 = 7,145.07/x
3. Step 3: Cross multiply
   13,113.42x = 18,095.83 × 7,145.07
4. Step 4: Simplify right side
   13,113.42x = 129,295,972.06
5. Step 5: Solve for x
   x = 129,295,972.06/13,113.42
6. Step 6: Final answer
   x = 9,859.82