Finding the Fourth Proportional to 2,131.30, 3,181.73 and 1,803.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.30 : 3,181.73 = 1,803.16 : x
2. Step 2: Convert to fraction form
   2,131.30/3,181.73 = 1,803.16/x
3. Step 3: Cross multiply
   2,131.30x = 3,181.73 × 1,803.16
4. Step 4: Simplify right side
   2,131.30x = 5,737,168.27
5. Step 5: Solve for x
   x = 5,737,168.27/2,131.30
6. Step 6: Final answer
   x = 2,691.86