Finding the Fourth Proportional to 2,783.76, 3,830.40 and 2,718.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,783.76 : 3,830.40 = 2,718.12 : x
2. Step 2: Convert to fraction form
   2,783.76/3,830.40 = 2,718.12/x
3. Step 3: Cross multiply
   2,783.76x = 3,830.40 × 2,718.12
4. Step 4: Simplify right side
   2,783.76x = 10,411,486.85
5. Step 5: Solve for x
   x = 10,411,486.85/2,783.76
6. Step 6: Final answer
   x = 3,740.08