Finding the Fourth Proportional to 9,876.16, 13,629.01 and 5,399.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,876.16 : 13,629.01 = 5,399.87 : x
2. Step 2: Convert to fraction form
   9,876.16/13,629.01 = 5,399.87/x
3. Step 3: Cross multiply
   9,876.16x = 13,629.01 × 5,399.87
4. Step 4: Simplify right side
   9,876.16x = 73,594,810.71
5. Step 5: Solve for x
   x = 73,594,810.71/9,876.16
6. Step 6: Final answer
   x = 7,451.76