Finding the Fourth Proportional to 1,147.58, 1,584.98 and 912.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.58 : 1,584.98 = 912.27 : x
2. Step 2: Convert to fraction form
   1,147.58/1,584.98 = 912.27/x
3. Step 3: Cross multiply
   1,147.58x = 1,584.98 × 912.27
4. Step 4: Simplify right side
   1,147.58x = 1,445,925.14
5. Step 5: Solve for x
   x = 1,445,925.14/1,147.58
6. Step 6: Final answer
   x = 1,259.98