Finding the Fourth Proportional to 1,761.63, 2,641.91 and 1,217.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,761.63 : 2,641.91 = 1,217.31 : x
2. Step 2: Convert to fraction form
   1,761.63/2,641.91 = 1,217.31/x
3. Step 3: Cross multiply
   1,761.63x = 2,641.91 × 1,217.31
4. Step 4: Simplify right side
   1,761.63x = 3,216,017.38
5. Step 5: Solve for x
   x = 3,216,017.38/1,761.63
6. Step 6: Final answer
   x = 1,825.59