Finding the Fourth Proportional to 13,002.28, 19,491.78 and 4,680.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,002.28 : 19,491.78 = 4,680.34 : x
2. Step 2: Convert to fraction form
   13,002.28/19,491.78 = 4,680.34/x
3. Step 3: Cross multiply
   13,002.28x = 19,491.78 × 4,680.34
4. Step 4: Simplify right side
   13,002.28x = 91,228,157.61
5. Step 5: Solve for x
   x = 91,228,157.61/13,002.28
6. Step 6: Final answer
   x = 7,016.32