Finding the Fourth Proportional to 9,857.83, 13,603.58 and 5,381.65

Step by Step Solution

1. Step 1: Write the proportion equation
   9,857.83 : 13,603.58 = 5,381.65 : x
2. Step 2: Convert to fraction form
   9,857.83/13,603.58 = 5,381.65/x
3. Step 3: Cross multiply
   9,857.83x = 13,603.58 × 5,381.65
4. Step 4: Simplify right side
   9,857.83x = 73,209,645.39
5. Step 5: Solve for x
   x = 73,209,645.39/9,857.83
6. Step 6: Final answer
   x = 7,426.55