Finding the Fourth Proportional to 9,439.83, 13,026.47 and 5,190.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,439.83 : 13,026.47 = 5,190.81 : x
2. Step 2: Convert to fraction form
   9,439.83/13,026.47 = 5,190.81/x
3. Step 3: Cross multiply
   9,439.83x = 13,026.47 × 5,190.81
4. Step 4: Simplify right side
   9,439.83x = 67,617,904.79
5. Step 5: Solve for x
   x = 67,617,904.79/9,439.83
6. Step 6: Final answer
   x = 7,163.04