Finding the Fourth Proportional to 3,678.42, 5,076.17 and 1,999.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,678.42 : 5,076.17 = 1,999.86 : x
2. Step 2: Convert to fraction form
   3,678.42/5,076.17 = 1,999.86/x
3. Step 3: Cross multiply
   3,678.42x = 5,076.17 × 1,999.86
4. Step 4: Simplify right side
   3,678.42x = 10,151,619.34
5. Step 5: Solve for x
   x = 10,151,619.34/3,678.42
6. Step 6: Final answer
   x = 2,759.78