Finding the Fourth Proportional to 2,176.71, 3,002.49 and 1,291.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,176.71 : 3,002.49 = 1,291.89 : x
2. Step 2: Convert to fraction form
   2,176.71/3,002.49 = 1,291.89/x
3. Step 3: Cross multiply
   2,176.71x = 3,002.49 × 1,291.89
4. Step 4: Simplify right side
   2,176.71x = 3,878,886.81
5. Step 5: Solve for x
   x = 3,878,886.81/2,176.71
6. Step 6: Final answer
   x = 1,782.00