Finding the Fourth Proportional to 1,419.81, 2,128.59 and 1,110.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.81 : 2,128.59 = 1,110.75 : x
2. Step 2: Convert to fraction form
   1,419.81/2,128.59 = 1,110.75/x
3. Step 3: Cross multiply
   1,419.81x = 2,128.59 × 1,110.75
4. Step 4: Simplify right side
   1,419.81x = 2,364,331.34
5. Step 5: Solve for x
   x = 2,364,331.34/1,419.81
6. Step 6: Final answer
   x = 1,665.24