Finding the Fourth Proportional to 1,489.89, 2,055.78 and 1,116.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,489.89 : 2,055.78 = 1,116.08 : x
2. Step 2: Convert to fraction form
   1,489.89/2,055.78 = 1,116.08/x
3. Step 3: Cross multiply
   1,489.89x = 2,055.78 × 1,116.08
4. Step 4: Simplify right side
   1,489.89x = 2,294,412.37
5. Step 5: Solve for x
   x = 2,294,412.37/1,489.89
6. Step 6: Final answer
   x = 1,539.98