Finding the Fourth Proportional to 1,345.94, 2,019.82 and 480.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.94 : 2,019.82 = 480.25 : x
2. Step 2: Convert to fraction form
   1,345.94/2,019.82 = 480.25/x
3. Step 3: Cross multiply
   1,345.94x = 2,019.82 × 480.25
4. Step 4: Simplify right side
   1,345.94x = 970,018.56
5. Step 5: Solve for x
   x = 970,018.56/1,345.94
6. Step 6: Final answer
   x = 720.70