Finding the Fourth Proportional to 11,889.78, 17,835.57 and 3,569.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,889.78 : 17,835.57 = 3,569.15 : x
2. Step 2: Convert to fraction form
   11,889.78/17,835.57 = 3,569.15/x
3. Step 3: Cross multiply
   11,889.78x = 17,835.57 × 3,569.15
4. Step 4: Simplify right side
   11,889.78x = 63,657,824.67
5. Step 5: Solve for x
   x = 63,657,824.67/11,889.78
6. Step 6: Final answer
   x = 5,354.00