Finding the Fourth Proportional to 11,661.51, 17,488.22 and 3,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,661.51 : 17,488.22 = 3,868.50 : x
2. Step 2: Convert to fraction form
   11,661.51/17,488.22 = 3,868.50/x
3. Step 3: Cross multiply
   11,661.51x = 17,488.22 × 3,868.50
4. Step 4: Simplify right side
   11,661.51x = 67,653,159.73
5. Step 5: Solve for x
   x = 67,653,159.73/11,661.51
6. Step 6: Final answer
   x = 5,801.41