Finding the Fourth Proportional to 1,404.34, 2,106.51 and 479.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.34 : 2,106.51 = 479.98 : x
2. Step 2: Convert to fraction form
   1,404.34/2,106.51 = 479.98/x
3. Step 3: Cross multiply
   1,404.34x = 2,106.51 × 479.98
4. Step 4: Simplify right side
   1,404.34x = 1,011,082.67
5. Step 5: Solve for x
   x = 1,011,082.67/1,404.34
6. Step 6: Final answer
   x = 719.97