Finding the Fourth Proportional to 11,086.07, 15,305.05 and 7,688.01

Step by Step Solution

1. Step 1: Write the proportion equation
   11,086.07 : 15,305.05 = 7,688.01 : x
2. Step 2: Convert to fraction form
   11,086.07/15,305.05 = 7,688.01/x
3. Step 3: Cross multiply
   11,086.07x = 15,305.05 × 7,688.01
4. Step 4: Simplify right side
   11,086.07x = 117,665,444.45
5. Step 5: Solve for x
   x = 117,665,444.45/11,086.07
6. Step 6: Final answer
   x = 10,613.82