Finding the Fourth Proportional to 9,764.10, 13,473.24 and 5,515.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,764.10 : 13,473.24 = 5,515.21 : x
2. Step 2: Convert to fraction form
   9,764.10/13,473.24 = 5,515.21/x
3. Step 3: Cross multiply
   9,764.10x = 13,473.24 × 5,515.21
4. Step 4: Simplify right side
   9,764.10x = 74,307,804.34
5. Step 5: Solve for x
   x = 74,307,804.34/9,764.10
6. Step 6: Final answer
   x = 7,610.31