Finding the Fourth Proportional to 1,300.78, 1,951.10 and 479.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.78 : 1,951.10 = 479.00 : x
2. Step 2: Convert to fraction form
   1,300.78/1,951.10 = 479.00/x
3. Step 3: Cross multiply
   1,300.78x = 1,951.10 × 479.00
4. Step 4: Simplify right side
   1,300.78x = 934,568.34
5. Step 5: Solve for x
   x = 934,568.34/1,300.78
6. Step 6: Final answer
   x = 718.47