Finding the Fourth Proportional to 1,300.16, 1,949.42 and 478.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.16 : 1,949.42 = 478.28 : x
2. Step 2: Convert to fraction form
   1,300.16/1,949.42 = 478.28/x
3. Step 3: Cross multiply
   1,300.16x = 1,949.42 × 478.28
4. Step 4: Simplify right side
   1,300.16x = 932,368.60
5. Step 5: Solve for x
   x = 932,368.60/1,300.16
6. Step 6: Final answer
   x = 717.12