Finding the Fourth Proportional to 1,992.51, 2,750.91 and 1,284.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,992.51 : 2,750.91 = 1,284.72 : x
2. Step 2: Convert to fraction form
   1,992.51/2,750.91 = 1,284.72/x
3. Step 3: Cross multiply
   1,992.51x = 2,750.91 × 1,284.72
4. Step 4: Simplify right side
   1,992.51x = 3,534,149.10
5. Step 5: Solve for x
   x = 3,534,149.10/1,992.51
6. Step 6: Final answer
   x = 1,773.72