Finding the Fourth Proportional to 1,478.88, 2,213.37 and 1,111.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.88 : 2,213.37 = 1,111.14 : x
2. Step 2: Convert to fraction form
   1,478.88/2,213.37 = 1,111.14/x
3. Step 3: Cross multiply
   1,478.88x = 2,213.37 × 1,111.14
4. Step 4: Simplify right side
   1,478.88x = 2,459,363.94
5. Step 5: Solve for x
   x = 2,459,363.94/1,478.88
6. Step 6: Final answer
   x = 1,662.99