Finding the Fourth Proportional to 8,811.47, 12,156.75 and 5,031.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,811.47 : 12,156.75 = 5,031.91 : x
2. Step 2: Convert to fraction form
   8,811.47/12,156.75 = 5,031.91/x
3. Step 3: Cross multiply
   8,811.47x = 12,156.75 × 5,031.91
4. Step 4: Simplify right side
   8,811.47x = 61,171,671.89
5. Step 5: Solve for x
   x = 61,171,671.89/8,811.47
6. Step 6: Final answer
   x = 6,942.28