Finding the Fourth Proportional to 13,150.90, 19,720.71 and 4,828.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,150.90 : 19,720.71 = 4,828.18 : x
2. Step 2: Convert to fraction form
   13,150.90/19,720.71 = 4,828.18/x
3. Step 3: Cross multiply
   13,150.90x = 19,720.71 × 4,828.18
4. Step 4: Simplify right side
   13,150.90x = 95,215,137.61
5. Step 5: Solve for x
   x = 95,215,137.61/13,150.90
6. Step 6: Final answer
   x = 7,240.20