Finding the Fourth Proportional to 1,114.72, 1,538.42 and 672.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,114.72 : 1,538.42 = 672.98 : x
2. Step 2: Convert to fraction form
   1,114.72/1,538.42 = 672.98/x
3. Step 3: Cross multiply
   1,114.72x = 1,538.42 × 672.98
4. Step 4: Simplify right side
   1,114.72x = 1,035,326.37
5. Step 5: Solve for x
   x = 1,035,326.37/1,114.72
6. Step 6: Final answer
   x = 928.78