Finding the Fourth Proportional to 9,875.86, 13,629.06 and 5,399.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,875.86 : 13,629.06 = 5,399.36 : x
2. Step 2: Convert to fraction form
   9,875.86/13,629.06 = 5,399.36/x
3. Step 3: Cross multiply
   9,875.86x = 13,629.06 × 5,399.36
4. Step 4: Simplify right side
   9,875.86x = 73,588,184.37
5. Step 5: Solve for x
   x = 73,588,184.37/9,875.86
6. Step 6: Final answer
   x = 7,451.32