Finding the Fourth Proportional to 9,931.32, 13,706.38 and 5,739.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,931.32 : 13,706.38 = 5,739.48 : x
2. Step 2: Convert to fraction form
   9,931.32/13,706.38 = 5,739.48/x
3. Step 3: Cross multiply
   9,931.32x = 13,706.38 × 5,739.48
4. Step 4: Simplify right side
   9,931.32x = 78,667,493.88
5. Step 5: Solve for x
   x = 78,667,493.88/9,931.32
6. Step 6: Final answer
   x = 7,921.15