Finding the Fourth Proportional to 1,645.76, 2,466.84 and 1,235.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.76 : 2,466.84 = 1,235.72 : x
2. Step 2: Convert to fraction form
   1,645.76/2,466.84 = 1,235.72/x
3. Step 3: Cross multiply
   1,645.76x = 2,466.84 × 1,235.72
4. Step 4: Simplify right side
   1,645.76x = 3,048,323.52
5. Step 5: Solve for x
   x = 3,048,323.52/1,645.76
6. Step 6: Final answer
   x = 1,852.23