Finding the Fourth Proportional to 1,434.72, 2,152.91 and 810.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.72 : 2,152.91 = 810.51 : x
2. Step 2: Convert to fraction form
   1,434.72/2,152.91 = 810.51/x
3. Step 3: Cross multiply
   1,434.72x = 2,152.91 × 810.51
4. Step 4: Simplify right side
   1,434.72x = 1,744,951.03
5. Step 5: Solve for x
   x = 1,744,951.03/1,434.72
6. Step 6: Final answer
   x = 1,216.23