Finding the Fourth Proportional to 11,868.18, 17,799.60 and 5,290.17

Step by Step Solution

1. Step 1: Write the proportion equation
   11,868.18 : 17,799.60 = 5,290.17 : x
2. Step 2: Convert to fraction form
   11,868.18/17,799.60 = 5,290.17/x
3. Step 3: Cross multiply
   11,868.18x = 17,799.60 × 5,290.17
4. Step 4: Simplify right side
   11,868.18x = 94,162,909.93
5. Step 5: Solve for x
   x = 94,162,909.93/11,868.18
6. Step 6: Final answer
   x = 7,934.06