Finding the Fourth Proportional to 9,897.10, 13,659.76 and 7,391.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,897.10 : 13,659.76 = 7,391.76 : x
2. Step 2: Convert to fraction form
   9,897.10/13,659.76 = 7,391.76/x
3. Step 3: Cross multiply
   9,897.10x = 13,659.76 × 7,391.76
4. Step 4: Simplify right side
   9,897.10x = 100,969,667.58
5. Step 5: Solve for x
   x = 100,969,667.58/9,897.10
6. Step 6: Final answer
   x = 10,201.94