Finding the Fourth Proportional to 11,848.18, 17,766.31 and 3,947.90

Step by Step Solution

1. Step 1: Write the proportion equation
   11,848.18 : 17,766.31 = 3,947.90 : x
2. Step 2: Convert to fraction form
   11,848.18/17,766.31 = 3,947.90/x
3. Step 3: Cross multiply
   11,848.18x = 17,766.31 × 3,947.90
4. Step 4: Simplify right side
   11,848.18x = 70,139,516.55
5. Step 5: Solve for x
   x = 70,139,516.55/11,848.18
6. Step 6: Final answer
   x = 5,919.86