Finding the Fourth Proportional to 1,345.98, 2,019.90 and 524.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.98 : 2,019.90 = 524.25 : x
2. Step 2: Convert to fraction form
   1,345.98/2,019.90 = 524.25/x
3. Step 3: Cross multiply
   1,345.98x = 2,019.90 × 524.25
4. Step 4: Simplify right side
   1,345.98x = 1,058,932.58
5. Step 5: Solve for x
   x = 1,058,932.58/1,345.98
6. Step 6: Final answer
   x = 786.74