Finding the Fourth Proportional to 3,688.89, 5,090.60 and 2,010.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,688.89 : 5,090.60 = 2,010.31 : x
2. Step 2: Convert to fraction form
   3,688.89/5,090.60 = 2,010.31/x
3. Step 3: Cross multiply
   3,688.89x = 5,090.60 × 2,010.31
4. Step 4: Simplify right side
   3,688.89x = 10,233,695.48
5. Step 5: Solve for x
   x = 10,233,695.48/3,688.89
6. Step 6: Final answer
   x = 2,774.19