Finding the Fourth Proportional to 8,071.47, 12,111.83 and 3,140.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,071.47 : 12,111.83 = 3,140.48 : x
2. Step 2: Convert to fraction form
   8,071.47/12,111.83 = 3,140.48/x
3. Step 3: Cross multiply
   8,071.47x = 12,111.83 × 3,140.48
4. Step 4: Simplify right side
   8,071.47x = 38,036,883.62
5. Step 5: Solve for x
   x = 38,036,883.62/8,071.47
6. Step 6: Final answer
   x = 4,712.51