Finding the Fourth Proportional to 9,111.08, 13,666.76 and 3,187.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.08 : 13,666.76 = 3,187.76 : x
2. Step 2: Convert to fraction form
   9,111.08/13,666.76 = 3,187.76/x
3. Step 3: Cross multiply
   9,111.08x = 13,666.76 × 3,187.76
4. Step 4: Simplify right side
   9,111.08x = 43,566,278.54
5. Step 5: Solve for x
   x = 43,566,278.54/9,111.08
6. Step 6: Final answer
   x = 4,781.68