Finding the Fourth Proportional to 1,645.72, 2,271.06 and 1,120.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,645.72 : 2,271.06 = 1,120.84 : x
2. Step 2: Convert to fraction form
   1,645.72/2,271.06 = 1,120.84/x
3. Step 3: Cross multiply
   1,645.72x = 2,271.06 × 1,120.84
4. Step 4: Simplify right side
   1,645.72x = 2,545,494.89
5. Step 5: Solve for x
   x = 2,545,494.89/1,645.72
6. Step 6: Final answer
   x = 1,546.74