Finding the Fourth Proportional to 1,406.56, 2,109.15 and 529.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.56 : 2,109.15 = 529.21 : x
2. Step 2: Convert to fraction form
   1,406.56/2,109.15 = 529.21/x
3. Step 3: Cross multiply
   1,406.56x = 2,109.15 × 529.21
4. Step 4: Simplify right side
   1,406.56x = 1,116,183.27
5. Step 5: Solve for x
   x = 1,116,183.27/1,406.56
6. Step 6: Final answer
   x = 793.56