Finding the Fourth Proportional to 9,681.10, 13,359.14 and 5,431.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,681.10 : 13,359.14 = 5,431.58 : x
2. Step 2: Convert to fraction form
   9,681.10/13,359.14 = 5,431.58/x
3. Step 3: Cross multiply
   9,681.10x = 13,359.14 × 5,431.58
4. Step 4: Simplify right side
   9,681.10x = 72,561,143.69
5. Step 5: Solve for x
   x = 72,561,143.69/9,681.10
6. Step 6: Final answer
   x = 7,495.14