Finding the Fourth Proportional to 9,876.06, 13,628.79 and 5,399.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,876.06 : 13,628.79 = 5,399.82 : x
2. Step 2: Convert to fraction form
   9,876.06/13,628.79 = 5,399.82/x
3. Step 3: Cross multiply
   9,876.06x = 13,628.79 × 5,399.82
4. Step 4: Simplify right side
   9,876.06x = 73,593,012.82
5. Step 5: Solve for x
   x = 73,593,012.82/9,876.06
6. Step 6: Final answer
   x = 7,451.66