Finding the Fourth Proportional to 13,091.31, 18,065.37 and 7,426.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,091.31 : 18,065.37 = 7,426.58 : x
2. Step 2: Convert to fraction form
   13,091.31/18,065.37 = 7,426.58/x
3. Step 3: Cross multiply
   13,091.31x = 18,065.37 × 7,426.58
4. Step 4: Simplify right side
   13,091.31x = 134,163,960.70
5. Step 5: Solve for x
   x = 134,163,960.70/13,091.31
6. Step 6: Final answer
   x = 10,248.32