Finding the Fourth Proportional to 1,469.69, 2,202.72 and 811.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,469.69 : 2,202.72 = 811.01 : x
2. Step 2: Convert to fraction form
   1,469.69/2,202.72 = 811.01/x
3. Step 3: Cross multiply
   1,469.69x = 2,202.72 × 811.01
4. Step 4: Simplify right side
   1,469.69x = 1,786,432.69
5. Step 5: Solve for x
   x = 1,786,432.69/1,469.69
6. Step 6: Final answer
   x = 1,215.51