Finding the Fourth Proportional to 1,423.86, 1,964.85 and 826.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.86 : 1,964.85 = 826.25 : x
2. Step 2: Convert to fraction form
   1,423.86/1,964.85 = 826.25/x
3. Step 3: Cross multiply
   1,423.86x = 1,964.85 × 826.25
4. Step 4: Simplify right side
   1,423.86x = 1,623,457.31
5. Step 5: Solve for x
   x = 1,623,457.31/1,423.86
6. Step 6: Final answer
   x = 1,140.18