Finding the Fourth Proportional to 1,625.52, 2,443.20 and 1,236.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,625.52 : 2,443.20 = 1,236.72 : x
2. Step 2: Convert to fraction form
   1,625.52/2,443.20 = 1,236.72/x
3. Step 3: Cross multiply
   1,625.52x = 2,443.20 × 1,236.72
4. Step 4: Simplify right side
   1,625.52x = 3,021,554.30
5. Step 5: Solve for x
   x = 3,021,554.30/1,625.52
6. Step 6: Final answer
   x = 1,858.82