Finding the Fourth Proportional to 1,114.56, 1,538.28 and 672.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,114.56 : 1,538.28 = 672.50 : x
2. Step 2: Convert to fraction form
   1,114.56/1,538.28 = 672.50/x
3. Step 3: Cross multiply
   1,114.56x = 1,538.28 × 672.50
4. Step 4: Simplify right side
   1,114.56x = 1,034,485.61
5. Step 5: Solve for x
   x = 1,034,485.61/1,114.56
6. Step 6: Final answer
   x = 928.16