Finding the Fourth Proportional to 1,402.49, 1,924.77 and 1,290.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.49 : 1,924.77 = 1,290.71 : x
2. Step 2: Convert to fraction form
   1,402.49/1,924.77 = 1,290.71/x
3. Step 3: Cross multiply
   1,402.49x = 1,924.77 × 1,290.71
4. Step 4: Simplify right side
   1,402.49x = 2,484,324.70
5. Step 5: Solve for x
   x = 2,484,324.70/1,402.49
6. Step 6: Final answer
   x = 1,771.36