Finding the Fourth Proportional to 1,781.98, 2,672.71 and 1,290.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,781.98 : 2,672.71 = 1,290.74 : x
2. Step 2: Convert to fraction form
   1,781.98/2,672.71 = 1,290.74/x
3. Step 3: Cross multiply
   1,781.98x = 2,672.71 × 1,290.74
4. Step 4: Simplify right side
   1,781.98x = 3,449,773.71
5. Step 5: Solve for x
   x = 3,449,773.71/1,781.98
6. Step 6: Final answer
   x = 1,935.92