Finding the Fourth Proportional to 3,685.96, 5,086.70 and 2,113.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,685.96 : 5,086.70 = 2,113.93 : x
2. Step 2: Convert to fraction form
   3,685.96/5,086.70 = 2,113.93/x
3. Step 3: Cross multiply
   3,685.96x = 5,086.70 × 2,113.93
4. Step 4: Simplify right side
   3,685.96x = 10,752,927.73
5. Step 5: Solve for x
   x = 10,752,927.73/3,685.96
6. Step 6: Final answer
   x = 2,917.27