Finding the Fourth Proportional to 7,185.31, 10,777.15 and 1,920.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,185.31 : 10,777.15 = 1,920.86 : x
2. Step 2: Convert to fraction form
   7,185.31/10,777.15 = 1,920.86/x
3. Step 3: Cross multiply
   7,185.31x = 10,777.15 × 1,920.86
4. Step 4: Simplify right side
   7,185.31x = 20,701,445.90
5. Step 5: Solve for x
   x = 20,701,445.90/7,185.31
6. Step 6: Final answer
   x = 2,881.08