Finding the Fourth Proportional to 13,241.28, 19,870.29 and 7,401.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,241.28 : 19,870.29 = 7,401.72 : x
2. Step 2: Convert to fraction form
   13,241.28/19,870.29 = 7,401.72/x
3. Step 3: Cross multiply
   13,241.28x = 19,870.29 × 7,401.72
4. Step 4: Simplify right side
   13,241.28x = 147,074,322.90
5. Step 5: Solve for x
   x = 147,074,322.90/13,241.28
6. Step 6: Final answer
   x = 11,107.26