Finding the Fourth Proportional to 9,897.41, 13,657.94 and 5,421.18

Step by Step Solution

1. Step 1: Write the proportion equation
   9,897.41 : 13,657.94 = 5,421.18 : x
2. Step 2: Convert to fraction form
   9,897.41/13,657.94 = 5,421.18/x
3. Step 3: Cross multiply
   9,897.41x = 13,657.94 × 5,421.18
4. Step 4: Simplify right side
   9,897.41x = 74,042,144.39
5. Step 5: Solve for x
   x = 74,042,144.39/9,897.41
6. Step 6: Final answer
   x = 7,480.96