Finding the Fourth Proportional to 9,822.48, 13,555.31 and 5,515.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,822.48 : 13,555.31 = 5,515.76 : x
2. Step 2: Convert to fraction form
   9,822.48/13,555.31 = 5,515.76/x
3. Step 3: Cross multiply
   9,822.48x = 13,555.31 × 5,515.76
4. Step 4: Simplify right side
   9,822.48x = 74,767,741.33
5. Step 5: Solve for x
   x = 74,767,741.33/9,822.48
6. Step 6: Final answer
   x = 7,611.90