Finding the Fourth Proportional to 3,377.14, 5,053.34 and 1,991.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,377.14 : 5,053.34 = 1,991.10 : x
2. Step 2: Convert to fraction form
   3,377.14/5,053.34 = 1,991.10/x
3. Step 3: Cross multiply
   3,377.14x = 5,053.34 × 1,991.10
4. Step 4: Simplify right side
   3,377.14x = 10,061,705.27
5. Step 5: Solve for x
   x = 10,061,705.27/3,377.14
6. Step 6: Final answer
   x = 2,979.36