Finding the Fourth Proportional to 13,426.59, 18,527.69 and 7,457.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,426.59 : 18,527.69 = 7,457.76 : x
2. Step 2: Convert to fraction form
   13,426.59/18,527.69 = 7,457.76/x
3. Step 3: Cross multiply
   13,426.59x = 18,527.69 × 7,457.76
4. Step 4: Simplify right side
   13,426.59x = 138,175,028.09
5. Step 5: Solve for x
   x = 138,175,028.09/13,426.59
6. Step 6: Final answer
   x = 10,291.15