Finding the Fourth Proportional to 2,101.29, 3,147.82 and 1,920.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.29 : 3,147.82 = 1,920.86 : x
2. Step 2: Convert to fraction form
   2,101.29/3,147.82 = 1,920.86/x
3. Step 3: Cross multiply
   2,101.29x = 3,147.82 × 1,920.86
4. Step 4: Simplify right side
   2,101.29x = 6,046,521.53
5. Step 5: Solve for x
   x = 6,046,521.53/2,101.29
6. Step 6: Final answer
   x = 2,877.53