Finding the Fourth Proportional to 9,421.58, 13,002.57 and 5,173.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,421.58 : 13,002.57 = 5,173.36 : x
2. Step 2: Convert to fraction form
   9,421.58/13,002.57 = 5,173.36/x
3. Step 3: Cross multiply
   9,421.58x = 13,002.57 × 5,173.36
4. Step 4: Simplify right side
   9,421.58x = 67,266,910.52
5. Step 5: Solve for x
   x = 67,266,910.52/9,421.58
6. Step 6: Final answer
   x = 7,139.67