Finding the Fourth Proportional to 9,897.36, 13,658.34 and 5,421.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,897.36 : 13,658.34 = 5,421.38 : x
2. Step 2: Convert to fraction form
   9,897.36/13,658.34 = 5,421.38/x
3. Step 3: Cross multiply
   9,897.36x = 13,658.34 × 5,421.38
4. Step 4: Simplify right side
   9,897.36x = 74,047,051.31
5. Step 5: Solve for x
   x = 74,047,051.31/9,897.36
6. Step 6: Final answer
   x = 7,481.50