Finding the Fourth Proportional to 13,788.48, 19,028.88 and 7,500.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,788.48 : 19,028.88 = 7,500.72 : x
2. Step 2: Convert to fraction form
   13,788.48/19,028.88 = 7,500.72/x
3. Step 3: Cross multiply
   13,788.48x = 19,028.88 × 7,500.72
4. Step 4: Simplify right side
   13,788.48x = 142,730,300.79
5. Step 5: Solve for x
   x = 142,730,300.79/13,788.48
6. Step 6: Final answer
   x = 10,351.42