Finding the Fourth Proportional to 13,290.28, 19,937.88 and 5,499.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,290.28 : 19,937.88 = 5,499.72 : x
2. Step 2: Convert to fraction form
   13,290.28/19,937.88 = 5,499.72/x
3. Step 3: Cross multiply
   13,290.28x = 19,937.88 × 5,499.72
4. Step 4: Simplify right side
   13,290.28x = 109,652,757.39
5. Step 5: Solve for x
   x = 109,652,757.39/13,290.28
6. Step 6: Final answer
   x = 8,250.60