Finding the Fourth Proportional to 1,538.24, 2,308.52 and 1,128.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,538.24 : 2,308.52 = 1,128.44 : x
2. Step 2: Convert to fraction form
   1,538.24/2,308.52 = 1,128.44/x
3. Step 3: Cross multiply
   1,538.24x = 2,308.52 × 1,128.44
4. Step 4: Simplify right side
   1,538.24x = 2,605,026.31
5. Step 5: Solve for x
   x = 2,605,026.31/1,538.24
6. Step 6: Final answer
   x = 1,693.51