Finding the Fourth Proportional to 3,691.89, 5,094.87 and 2,120.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,691.89 : 5,094.87 = 2,120.34 : x
2. Step 2: Convert to fraction form
   3,691.89/5,094.87 = 2,120.34/x
3. Step 3: Cross multiply
   3,691.89x = 5,094.87 × 2,120.34
4. Step 4: Simplify right side
   3,691.89x = 10,802,856.66
5. Step 5: Solve for x
   x = 10,802,856.66/3,691.89
6. Step 6: Final answer
   x = 2,926.10