Finding the Fourth Proportional to 3,820.69, 5,272.65 and 2,142.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.69 : 5,272.65 = 2,142.05 : x
2. Step 2: Convert to fraction form
   3,820.69/5,272.65 = 2,142.05/x
3. Step 3: Cross multiply
   3,820.69x = 5,272.65 × 2,142.05
4. Step 4: Simplify right side
   3,820.69x = 11,294,279.93
5. Step 5: Solve for x
   x = 11,294,279.93/3,820.69
6. Step 6: Final answer
   x = 2,956.08