Finding the Fourth Proportional to 11,689.31, 17,537.61 and 3,903.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11,689.31 : 17,537.61 = 3,903.59 : x
2. Step 2: Convert to fraction form
   11,689.31/17,537.61 = 3,903.59/x
3. Step 3: Cross multiply
   11,689.31x = 17,537.61 × 3,903.59
4. Step 4: Simplify right side
   11,689.31x = 68,459,531.81
5. Step 5: Solve for x
   x = 68,459,531.81/11,689.31
6. Step 6: Final answer
   x = 5,856.60