Finding the Fourth Proportional to 1,300.71, 1,951.52 and 813.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.71 : 1,951.52 = 813.19 : x
2. Step 2: Convert to fraction form
   1,300.71/1,951.52 = 813.19/x
3. Step 3: Cross multiply
   1,300.71x = 1,951.52 × 813.19
4. Step 4: Simplify right side
   1,300.71x = 1,586,956.55
5. Step 5: Solve for x
   x = 1,586,956.55/1,300.71
6. Step 6: Final answer
   x = 1,220.07