Finding the Fourth Proportional to 1,300.91, 1,951.37 and 520.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.91 : 1,951.37 = 520.97 : x
2. Step 2: Convert to fraction form
   1,300.91/1,951.37 = 520.97/x
3. Step 3: Cross multiply
   1,300.91x = 1,951.37 × 520.97
4. Step 4: Simplify right side
   1,300.91x = 1,016,605.23
5. Step 5: Solve for x
   x = 1,016,605.23/1,300.91
6. Step 6: Final answer
   x = 781.46