Finding the Fourth Proportional to 1,816.25, 2,505.81 and 1,256.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,816.25 : 2,505.81 = 1,256.51 : x
2. Step 2: Convert to fraction form
   1,816.25/2,505.81 = 1,256.51/x
3. Step 3: Cross multiply
   1,816.25x = 2,505.81 × 1,256.51
4. Step 4: Simplify right side
   1,816.25x = 3,148,575.32
5. Step 5: Solve for x
   x = 3,148,575.32/1,816.25
6. Step 6: Final answer
   x = 1,733.56