Finding the Fourth Proportional to 9,858.51, 13,604.80 and 5,382.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,858.51 : 13,604.80 = 5,382.25 : x
2. Step 2: Convert to fraction form
   9,858.51/13,604.80 = 5,382.25/x
3. Step 3: Cross multiply
   9,858.51x = 13,604.80 × 5,382.25
4. Step 4: Simplify right side
   9,858.51x = 73,224,434.80
5. Step 5: Solve for x
   x = 73,224,434.80/9,858.51
6. Step 6: Final answer
   x = 7,427.54