Finding the Fourth Proportional to 11,587.59, 15,989.68 and 7,111.53

Step by Step Solution

1. Step 1: Write the proportion equation
   11,587.59 : 15,989.68 = 7,111.53 : x
2. Step 2: Convert to fraction form
   11,587.59/15,989.68 = 7,111.53/x
3. Step 3: Cross multiply
   11,587.59x = 15,989.68 × 7,111.53
4. Step 4: Simplify right side
   11,587.59x = 113,711,053.45
5. Step 5: Solve for x
   x = 113,711,053.45/11,587.59
6. Step 6: Final answer
   x = 9,813.18