Finding the Fourth Proportional to 1,478.94, 2,216.69 and 1,112.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.94 : 2,216.69 = 1,112.55 : x
2. Step 2: Convert to fraction form
   1,478.94/2,216.69 = 1,112.55/x
3. Step 3: Cross multiply
   1,478.94x = 2,216.69 × 1,112.55
4. Step 4: Simplify right side
   1,478.94x = 2,466,172.90
5. Step 5: Solve for x
   x = 2,466,172.90/1,478.94
6. Step 6: Final answer
   x = 1,667.53