Finding the Fourth Proportional to 1,256.12, 1,883.82 and 423.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256.12 : 1,883.82 = 423.10 : x
2. Step 2: Convert to fraction form
   1,256.12/1,883.82 = 423.10/x
3. Step 3: Cross multiply
   1,256.12x = 1,883.82 × 423.10
4. Step 4: Simplify right side
   1,256.12x = 797,037.59
5. Step 5: Solve for x
   x = 797,037.59/1,256.12
6. Step 6: Final answer
   x = 634.52