Finding the Fourth Proportional to 9,931.46, 13,705.73 and 5,739.71

Step by Step Solution

1. Step 1: Write the proportion equation
   9,931.46 : 13,705.73 = 5,739.71 : x
2. Step 2: Convert to fraction form
   9,931.46/13,705.73 = 5,739.71/x
3. Step 3: Cross multiply
   9,931.46x = 13,705.73 × 5,739.71
4. Step 4: Simplify right side
   9,931.46x = 78,666,818.31
5. Step 5: Solve for x
   x = 78,666,818.31/9,931.46
6. Step 6: Final answer
   x = 7,920.98