Finding the Fourth Proportional to 1,784.77, 2,449.63 and 1,618.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,784.77 : 2,449.63 = 1,618.72 : x
2. Step 2: Convert to fraction form
   1,784.77/2,449.63 = 1,618.72/x
3. Step 3: Cross multiply
   1,784.77x = 2,449.63 × 1,618.72
4. Step 4: Simplify right side
   1,784.77x = 3,965,265.07
5. Step 5: Solve for x
   x = 3,965,265.07/1,784.77
6. Step 6: Final answer
   x = 2,221.72