Finding the Fourth Proportional to 2,543.79, 3,810.24 and 1,920.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.79 : 3,810.24 = 1,920.63 : x
2. Step 2: Convert to fraction form
   2,543.79/3,810.24 = 1,920.63/x
3. Step 3: Cross multiply
   2,543.79x = 3,810.24 × 1,920.63
4. Step 4: Simplify right side
   2,543.79x = 7,318,061.25
5. Step 5: Solve for x
   x = 7,318,061.25/2,543.79
6. Step 6: Final answer
   x = 2,876.83