Finding the Fourth Proportional to 2,017.86, 2,784.64 and 1,121.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.86 : 2,784.64 = 1,121.60 : x
2. Step 2: Convert to fraction form
   2,017.86/2,784.64 = 1,121.60/x
3. Step 3: Cross multiply
   2,017.86x = 2,784.64 × 1,121.60
4. Step 4: Simplify right side
   2,017.86x = 3,123,252.22
5. Step 5: Solve for x
   x = 3,123,252.22/2,017.86
6. Step 6: Final answer
   x = 1,547.80