Finding the Fourth Proportional to 13,015.50, 17,964.63 and 7,429.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,015.50 : 17,964.63 = 7,429.74 : x
2. Step 2: Convert to fraction form
   13,015.50/17,964.63 = 7,429.74/x
3. Step 3: Cross multiply
   13,015.50x = 17,964.63 × 7,429.74
4. Step 4: Simplify right side
   13,015.50x = 133,472,530.10
5. Step 5: Solve for x
   x = 133,472,530.10/13,015.50
6. Step 6: Final answer
   x = 10,254.89