Finding the Fourth Proportional to 2,784.35, 4,177.70 and 1,223.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,784.35 : 4,177.70 = 1,223.55 : x
2. Step 2: Convert to fraction form
   2,784.35/4,177.70 = 1,223.55/x
3. Step 3: Cross multiply
   2,784.35x = 4,177.70 × 1,223.55
4. Step 4: Simplify right side
   2,784.35x = 5,111,623.31
5. Step 5: Solve for x
   x = 5,111,623.31/2,784.35
6. Step 6: Final answer
   x = 1,835.84