Finding the Fourth Proportional to 2,180.54, 3,266.76 and 1,691.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,180.54 : 3,266.76 = 1,691.30 : x
2. Step 2: Convert to fraction form
   2,180.54/3,266.76 = 1,691.30/x
3. Step 3: Cross multiply
   2,180.54x = 3,266.76 × 1,691.30
4. Step 4: Simplify right side
   2,180.54x = 5,525,071.19
5. Step 5: Solve for x
   x = 5,525,071.19/2,180.54
6. Step 6: Final answer
   x = 2,533.81