Finding the Fourth Proportional to 2,181.15, 3,271.86 and 1,071.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.15 : 3,271.86 = 1,071.63 : x
2. Step 2: Convert to fraction form
   2,181.15/3,271.86 = 1,071.63/x
3. Step 3: Cross multiply
   2,181.15x = 3,271.86 × 1,071.63
4. Step 4: Simplify right side
   2,181.15x = 3,506,223.33
5. Step 5: Solve for x
   x = 3,506,223.33/2,181.15
6. Step 6: Final answer
   x = 1,607.51