Finding the Fourth Proportional to 13,013.76, 19,521.50 and 5,221.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,013.76 : 19,521.50 = 5,221.56 : x
2. Step 2: Convert to fraction form
   13,013.76/19,521.50 = 5,221.56/x
3. Step 3: Cross multiply
   13,013.76x = 19,521.50 × 5,221.56
4. Step 4: Simplify right side
   13,013.76x = 101,932,657.43
5. Step 5: Solve for x
   x = 101,932,657.43/13,013.76
6. Step 6: Final answer
   x = 7,832.68