Finding the Fourth Proportional to 8,103.94, 12,156.90 and 3,172.93

Step by Step Solution

1. Step 1: Write the proportion equation
   8,103.94 : 12,156.90 = 3,172.93 : x
2. Step 2: Convert to fraction form
   8,103.94/12,156.90 = 3,172.93/x
3. Step 3: Cross multiply
   8,103.94x = 12,156.90 × 3,172.93
4. Step 4: Simplify right side
   8,103.94x = 38,572,992.72
5. Step 5: Solve for x
   x = 38,572,992.72/8,103.94
6. Step 6: Final answer
   x = 4,759.78