Finding the Fourth Proportional to 1,300.48, 1,951.45 and 520.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.48 : 1,951.45 = 520.54 : x
2. Step 2: Convert to fraction form
   1,300.48/1,951.45 = 520.54/x
3. Step 3: Cross multiply
   1,300.48x = 1,951.45 × 520.54
4. Step 4: Simplify right side
   1,300.48x = 1,015,805.81
5. Step 5: Solve for x
   x = 1,015,805.81/1,300.48
6. Step 6: Final answer
   x = 781.10