Finding the Fourth Proportional to 9,471.35, 13,071.72 and 5,439.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,471.35 : 13,071.72 = 5,439.77 : x
2. Step 2: Convert to fraction form
   9,471.35/13,071.72 = 5,439.77/x
3. Step 3: Cross multiply
   9,471.35x = 13,071.72 × 5,439.77
4. Step 4: Simplify right side
   9,471.35x = 71,107,150.30
5. Step 5: Solve for x
   x = 71,107,150.30/9,471.35
6. Step 6: Final answer
   x = 7,507.60