Finding the Fourth Proportional to 1,458.78, 2,186.66 and 1,111.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,458.78 : 2,186.66 = 1,111.14 : x
2. Step 2: Convert to fraction form
   1,458.78/2,186.66 = 1,111.14/x
3. Step 3: Cross multiply
   1,458.78x = 2,186.66 × 1,111.14
4. Step 4: Simplify right side
   1,458.78x = 2,429,685.39
5. Step 5: Solve for x
   x = 2,429,685.39/1,458.78
6. Step 6: Final answer
   x = 1,665.56