Finding the Fourth Proportional to 9,858.30, 13,604.37 and 5,381.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,858.30 : 13,604.37 = 5,381.98 : x
2. Step 2: Convert to fraction form
   9,858.30/13,604.37 = 5,381.98/x
3. Step 3: Cross multiply
   9,858.30x = 13,604.37 × 5,381.98
4. Step 4: Simplify right side
   9,858.30x = 73,218,447.25
5. Step 5: Solve for x
   x = 73,218,447.25/9,858.30
6. Step 6: Final answer
   x = 7,427.09