Finding the Fourth Proportional to 11,886.85, 17,826.42 and 5,317.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,886.85 : 17,826.42 = 5,317.75 : x
2. Step 2: Convert to fraction form
   11,886.85/17,826.42 = 5,317.75/x
3. Step 3: Cross multiply
   11,886.85x = 17,826.42 × 5,317.75
4. Step 4: Simplify right side
   11,886.85x = 94,796,355.82
5. Step 5: Solve for x
   x = 94,796,355.82/11,886.85
6. Step 6: Final answer
   x = 7,974.90