Finding the Fourth Proportional to 2,778.42, 3,827.72 and 1,937.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,778.42 : 3,827.72 = 1,937.60 : x
2. Step 2: Convert to fraction form
   2,778.42/3,827.72 = 1,937.60/x
3. Step 3: Cross multiply
   2,778.42x = 3,827.72 × 1,937.60
4. Step 4: Simplify right side
   2,778.42x = 7,416,561.45
5. Step 5: Solve for x
   x = 7,416,561.45/2,778.42
6. Step 6: Final answer
   x = 2,669.34