Finding the Fourth Proportional to 11,683.82, 17,513.58 and 5,108.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,683.82 : 17,513.58 = 5,108.78 : x
2. Step 2: Convert to fraction form
   11,683.82/17,513.58 = 5,108.78/x
3. Step 3: Cross multiply
   11,683.82x = 17,513.58 × 5,108.78
4. Step 4: Simplify right side
   11,683.82x = 89,473,027.23
5. Step 5: Solve for x
   x = 89,473,027.23/11,683.82
6. Step 6: Final answer
   x = 7,657.86