Finding the Fourth Proportional to 1,631.51, 2,445.42 and 810.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,631.51 : 2,445.42 = 810.37 : x
2. Step 2: Convert to fraction form
   1,631.51/2,445.42 = 810.37/x
3. Step 3: Cross multiply
   1,631.51x = 2,445.42 × 810.37
4. Step 4: Simplify right side
   1,631.51x = 1,981,682.78
5. Step 5: Solve for x
   x = 1,981,682.78/1,631.51
6. Step 6: Final answer
   x = 1,214.63