Finding the Fourth Proportional to 9,858.76, 13,604.70 and 5,382.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,858.76 : 13,604.70 = 5,382.70 : x
2. Step 2: Convert to fraction form
   9,858.76/13,604.70 = 5,382.70/x
3. Step 3: Cross multiply
   9,858.76x = 13,604.70 × 5,382.70
4. Step 4: Simplify right side
   9,858.76x = 73,230,018.69
5. Step 5: Solve for x
   x = 73,230,018.69/9,858.76
6. Step 6: Final answer
   x = 7,427.91