Finding the Fourth Proportional to 11,663.91, 17,498.39 and 3,766.87

Step by Step Solution

1. Step 1: Write the proportion equation
   11,663.91 : 17,498.39 = 3,766.87 : x
2. Step 2: Convert to fraction form
   11,663.91/17,498.39 = 3,766.87/x
3. Step 3: Cross multiply
   11,663.91x = 17,498.39 × 3,766.87
4. Step 4: Simplify right side
   11,663.91x = 65,914,160.34
5. Step 5: Solve for x
   x = 65,914,160.34/11,663.91
6. Step 6: Final answer
   x = 5,651.12