Finding the Fourth Proportional to 3,703.69, 5,111.05 and 2,131.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,703.69 : 5,111.05 = 2,131.78 : x
2. Step 2: Convert to fraction form
   3,703.69/5,111.05 = 2,131.78/x
3. Step 3: Cross multiply
   3,703.69x = 5,111.05 × 2,131.78
4. Step 4: Simplify right side
   3,703.69x = 10,895,634.17
5. Step 5: Solve for x
   x = 10,895,634.17/3,703.69
6. Step 6: Final answer
   x = 2,941.83