Finding the Fourth Proportional to 8,100.48, 12,133.13 and 3,931.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,100.48 : 12,133.13 = 3,931.72 : x
2. Step 2: Convert to fraction form
   8,100.48/12,133.13 = 3,931.72/x
3. Step 3: Cross multiply
   8,100.48x = 12,133.13 × 3,931.72
4. Step 4: Simplify right side
   8,100.48x = 47,704,069.88
5. Step 5: Solve for x
   x = 47,704,069.88/8,100.48
6. Step 6: Final answer
   x = 5,889.05