Finding the Fourth Proportional to 1,300.56, 1,951.02 and 478.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.56 : 1,951.02 = 478.80 : x
2. Step 2: Convert to fraction form
   1,300.56/1,951.02 = 478.80/x
3. Step 3: Cross multiply
   1,300.56x = 1,951.02 × 478.80
4. Step 4: Simplify right side
   1,300.56x = 934,148.38
5. Step 5: Solve for x
   x = 934,148.38/1,300.56
6. Step 6: Final answer
   x = 718.27