Finding the Fourth Proportional to 11,865.69, 17,797.01 and 5,290.36

Step by Step Solution

1. Step 1: Write the proportion equation
   11,865.69 : 17,797.01 = 5,290.36 : x
2. Step 2: Convert to fraction form
   11,865.69/17,797.01 = 5,290.36/x
3. Step 3: Cross multiply
   11,865.69x = 17,797.01 × 5,290.36
4. Step 4: Simplify right side
   11,865.69x = 94,152,518.88
5. Step 5: Solve for x
   x = 94,152,518.88/11,865.69
6. Step 6: Final answer
   x = 7,934.85