Finding the Fourth Proportional to 9,857.35, 13,603.47 and 5,381.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,857.35 : 13,603.47 = 5,381.34 : x
2. Step 2: Convert to fraction form
   9,857.35/13,603.47 = 5,381.34/x
3. Step 3: Cross multiply
   9,857.35x = 13,603.47 × 5,381.34
4. Step 4: Simplify right side
   9,857.35x = 73,204,870.34
5. Step 5: Solve for x
   x = 73,204,870.34/9,857.35
6. Step 6: Final answer
   x = 7,426.42