Finding the Fourth Proportional to 1,114.78, 1,538.30 and 672.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,114.78 : 1,538.30 = 672.52 : x
2. Step 2: Convert to fraction form
   1,114.78/1,538.30 = 672.52/x
3. Step 3: Cross multiply
   1,114.78x = 1,538.30 × 672.52
4. Step 4: Simplify right side
   1,114.78x = 1,034,537.52
5. Step 5: Solve for x
   x = 1,034,537.52/1,114.78
6. Step 6: Final answer
   x = 928.02