Finding the Fourth Proportional to 1,112.37, 1,533.60 and 912.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.37 : 1,533.60 = 912.47 : x
2. Step 2: Convert to fraction form
   1,112.37/1,533.60 = 912.47/x
3. Step 3: Cross multiply
   1,112.37x = 1,533.60 × 912.47
4. Step 4: Simplify right side
   1,112.37x = 1,399,356.32
5. Step 5: Solve for x
   x = 1,399,356.32/1,112.37
6. Step 6: Final answer
   x = 1,258.00