Finding the Fourth Proportional to 1,345.46, 2,018.42 and 479.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.46 : 2,018.42 = 479.56 : x
2. Step 2: Convert to fraction form
   1,345.46/2,018.42 = 479.56/x
3. Step 3: Cross multiply
   1,345.46x = 2,018.42 × 479.56
4. Step 4: Simplify right side
   1,345.46x = 967,953.50
5. Step 5: Solve for x
   x = 967,953.50/1,345.46
6. Step 6: Final answer
   x = 719.42