Finding the Fourth Proportional to 1,788.56, 2,680.37 and 1,291.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,788.56 : 2,680.37 = 1,291.00 : x
2. Step 2: Convert to fraction form
   1,788.56/2,680.37 = 1,291.00/x
3. Step 3: Cross multiply
   1,788.56x = 2,680.37 × 1,291.00
4. Step 4: Simplify right side
   1,788.56x = 3,460,337.81
5. Step 5: Solve for x
   x = 3,460,337.81/1,788.56
6. Step 6: Final answer
   x = 1,934.71