Finding the Fourth Proportional to 2,783.55, 3,903.45 and 2,783.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,783.55 : 3,903.45 = 2,783.55 : x
2. Step 2: Convert to fraction form
   2,783.55/3,903.45 = 2,783.55/x
3. Step 3: Cross multiply
   2,783.55x = 3,903.45 × 2,783.55
4. Step 4: Simplify right side
   2,783.55x = 10,865,448.25
5. Step 5: Solve for x
   x = 10,865,448.25/2,783.55
6. Step 6: Final answer
   x = 3,903.45