Finding the Fourth Proportional to 1,284.71, 1,773.20 and 1,074.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,284.71 : 1,773.20 = 1,074.51 : x
2. Step 2: Convert to fraction form
   1,284.71/1,773.20 = 1,074.51/x
3. Step 3: Cross multiply
   1,284.71x = 1,773.20 × 1,074.51
4. Step 4: Simplify right side
   1,284.71x = 1,905,323.82
5. Step 5: Solve for x
   x = 1,905,323.82/1,284.71
6. Step 6: Final answer
   x = 1,483.08