Finding the Fourth Proportional to 9,857.62, 13,603.83 and 5,381.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,857.62 : 13,603.83 = 5,381.61 : x
2. Step 2: Convert to fraction form
   9,857.62/13,603.83 = 5,381.61/x
3. Step 3: Cross multiply
   9,857.62x = 13,603.83 × 5,381.61
4. Step 4: Simplify right side
   9,857.62x = 73,210,466.64
5. Step 5: Solve for x
   x = 73,210,466.64/9,857.62
6. Step 6: Final answer
   x = 7,426.79