Finding the Fourth Proportional to 11,911.89, 17,869.65 and 3,590.82

Step by Step Solution

1. Step 1: Write the proportion equation
   11,911.89 : 17,869.65 = 3,590.82 : x
2. Step 2: Convert to fraction form
   11,911.89/17,869.65 = 3,590.82/x
3. Step 3: Cross multiply
   11,911.89x = 17,869.65 × 3,590.82
4. Step 4: Simplify right side
   11,911.89x = 64,166,696.61
5. Step 5: Solve for x
   x = 64,166,696.61/11,911.89
6. Step 6: Final answer
   x = 5,386.78