Finding the Fourth Proportional to 13,086.30, 18,059.20 and 7,117.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.30 : 18,059.20 = 7,117.94 : x
2. Step 2: Convert to fraction form
   13,086.30/18,059.20 = 7,117.94/x
3. Step 3: Cross multiply
   13,086.30x = 18,059.20 × 7,117.94
4. Step 4: Simplify right side
   13,086.30x = 128,544,302.05
5. Step 5: Solve for x
   x = 128,544,302.05/13,086.30
6. Step 6: Final answer
   x = 9,822.81