Finding the Fourth Proportional to 11,911.42, 17,868.95 and 3,590.36

Step by Step Solution

1. Step 1: Write the proportion equation
   11,911.42 : 17,868.95 = 3,590.36 : x
2. Step 2: Convert to fraction form
   11,911.42/17,868.95 = 3,590.36/x
3. Step 3: Cross multiply
   11,911.42x = 17,868.95 × 3,590.36
4. Step 4: Simplify right side
   11,911.42x = 64,155,956.69
5. Step 5: Solve for x
   x = 64,155,956.69/11,911.42
6. Step 6: Final answer
   x = 5,386.09