Finding the Fourth Proportional to 1,540.48, 2,308.80 and 889.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,540.48 : 2,308.80 = 889.84 : x
2. Step 2: Convert to fraction form
   1,540.48/2,308.80 = 889.84/x
3. Step 3: Cross multiply
   1,540.48x = 2,308.80 × 889.84
4. Step 4: Simplify right side
   1,540.48x = 2,054,462.59
5. Step 5: Solve for x
   x = 2,054,462.59/1,540.48
6. Step 6: Final answer
   x = 1,333.65