Finding the Fourth Proportional to 1,076.52, 1,612.49 and 520.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,076.52 : 1,612.49 = 520.39 : x
2. Step 2: Convert to fraction form
   1,076.52/1,612.49 = 520.39/x
3. Step 3: Cross multiply
   1,076.52x = 1,612.49 × 520.39
4. Step 4: Simplify right side
   1,076.52x = 839,126.01
5. Step 5: Solve for x
   x = 839,126.01/1,076.52
6. Step 6: Final answer
   x = 779.48