Finding the Fourth Proportional to 1,478.72, 2,219.10 and 957.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,478.72 : 2,219.10 = 957.43 : x
2. Step 2: Convert to fraction form
   1,478.72/2,219.10 = 957.43/x
3. Step 3: Cross multiply
   1,478.72x = 2,219.10 × 957.43
4. Step 4: Simplify right side
   1,478.72x = 2,124,627.37
5. Step 5: Solve for x
   x = 2,124,627.37/1,478.72
6. Step 6: Final answer
   x = 1,436.81