Finding the Fourth Proportional to 13,200.88, 19,811.28 and 4,888.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.88 : 19,811.28 = 4,888.72 : x
2. Step 2: Convert to fraction form
   13,200.88/19,811.28 = 4,888.72/x
3. Step 3: Cross multiply
   13,200.88x = 19,811.28 × 4,888.72
4. Step 4: Simplify right side
   13,200.88x = 96,851,800.76
5. Step 5: Solve for x
   x = 96,851,800.76/13,200.88
6. Step 6: Final answer
   x = 7,336.77