Finding the Fourth Proportional to 13,287.88, 19,933.98 and 4,521.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,287.88 : 19,933.98 = 4,521.88 : x
2. Step 2: Convert to fraction form
   13,287.88/19,933.98 = 4,521.88/x
3. Step 3: Cross multiply
   13,287.88x = 19,933.98 × 4,521.88
4. Step 4: Simplify right side
   13,287.88x = 90,139,065.48
5. Step 5: Solve for x
   x = 90,139,065.48/13,287.88
6. Step 6: Final answer
   x = 6,783.56