Finding the Fourth Proportional to 3,685.77, 5,086.40 and 2,113.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.77 : 5,086.40 = 2,113.83 : x
2. Step 2: Convert to fraction form
   3,685.77/5,086.40 = 2,113.83/x
3. Step 3: Cross multiply
   3,685.77x = 5,086.40 × 2,113.83
4. Step 4: Simplify right side
   3,685.77x = 10,751,774.34
5. Step 5: Solve for x
   x = 10,751,774.34/3,685.77
6. Step 6: Final answer
   x = 2,917.10