Finding the Fourth Proportional to 1,404.32, 2,105.45 and 479.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.32 : 2,105.45 = 479.63 : x
2. Step 2: Convert to fraction form
   1,404.32/2,105.45 = 479.63/x
3. Step 3: Cross multiply
   1,404.32x = 2,105.45 × 479.63
4. Step 4: Simplify right side
   1,404.32x = 1,009,834.59
5. Step 5: Solve for x
   x = 1,009,834.59/1,404.32
6. Step 6: Final answer
   x = 719.09