Finding the Fourth Proportional to 11,112.80, 16,665.72 and 3,715.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,112.80 : 16,665.72 = 3,715.54 : x
2. Step 2: Convert to fraction form
   11,112.80/16,665.72 = 3,715.54/x
3. Step 3: Cross multiply
   11,112.80x = 16,665.72 × 3,715.54
4. Step 4: Simplify right side
   11,112.80x = 61,922,093.69
5. Step 5: Solve for x
   x = 61,922,093.69/11,112.80
6. Step 6: Final answer
   x = 5,572.14