Finding the Fourth Proportional to 10,987.39, 16,477.71 and 3,966.54

Step by Step Solution

1. Step 1: Write the proportion equation
   10,987.39 : 16,477.71 = 3,966.54 : x
2. Step 2: Convert to fraction form
   10,987.39/16,477.71 = 3,966.54/x
3. Step 3: Cross multiply
   10,987.39x = 16,477.71 × 3,966.54
4. Step 4: Simplify right side
   10,987.39x = 65,359,495.82
5. Step 5: Solve for x
   x = 65,359,495.82/10,987.39
6. Step 6: Final answer
   x = 5,948.59