Finding the Fourth Proportional to 2,109.53, 3,159.42 and 1,377.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.53 : 3,159.42 = 1,377.29 : x
2. Step 2: Convert to fraction form
   2,109.53/3,159.42 = 1,377.29/x
3. Step 3: Cross multiply
   2,109.53x = 3,159.42 × 1,377.29
4. Step 4: Simplify right side
   2,109.53x = 4,351,421.77
5. Step 5: Solve for x
   x = 4,351,421.77/2,109.53
6. Step 6: Final answer
   x = 2,062.75