Finding the Fourth Proportional to 1,404.15, 2,106.54 and 479.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.15 : 2,106.54 = 479.67 : x
2. Step 2: Convert to fraction form
   1,404.15/2,106.54 = 479.67/x
3. Step 3: Cross multiply
   1,404.15x = 2,106.54 × 479.67
4. Step 4: Simplify right side
   1,404.15x = 1,010,444.04
5. Step 5: Solve for x
   x = 1,010,444.04/1,404.15
6. Step 6: Final answer
   x = 719.61