Finding the Fourth Proportional to 13,240.72, 19,854.60 and 7,395.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,240.72 : 19,854.60 = 7,395.76 : x
2. Step 2: Convert to fraction form
   13,240.72/19,854.60 = 7,395.76/x
3. Step 3: Cross multiply
   13,240.72x = 19,854.60 × 7,395.76
4. Step 4: Simplify right side
   13,240.72x = 146,839,856.50
5. Step 5: Solve for x
   x = 146,839,856.50/13,240.72
6. Step 6: Final answer
   x = 11,090.02