Finding the Fourth Proportional to 3,685.88, 5,086.53 and 2,113.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.88 : 5,086.53 = 2,113.98 : x
2. Step 2: Convert to fraction form
   3,685.88/5,086.53 = 2,113.98/x
3. Step 3: Cross multiply
   3,685.88x = 5,086.53 × 2,113.98
4. Step 4: Simplify right side
   3,685.88x = 10,752,822.69
5. Step 5: Solve for x
   x = 10,752,822.69/3,685.88
6. Step 6: Final answer
   x = 2,917.31