Finding the Fourth Proportional to 2,086.37, 3,113.72 and 2,001.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.37 : 3,113.72 = 2,001.60 : x
2. Step 2: Convert to fraction form
   2,086.37/3,113.72 = 2,001.60/x
3. Step 3: Cross multiply
   2,086.37x = 3,113.72 × 2,001.60
4. Step 4: Simplify right side
   2,086.37x = 6,232,422.11
5. Step 5: Solve for x
   x = 6,232,422.11/2,086.37
6. Step 6: Final answer
   x = 2,987.20