Finding the Fourth Proportional to 1,991.72, 2,985.38 and 1,446.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.72 : 2,985.38 = 1,446.28 : x
2. Step 2: Convert to fraction form
   1,991.72/2,985.38 = 1,446.28/x
3. Step 3: Cross multiply
   1,991.72x = 2,985.38 × 1,446.28
4. Step 4: Simplify right side
   1,991.72x = 4,317,695.39
5. Step 5: Solve for x
   x = 4,317,695.39/1,991.72
6. Step 6: Final answer
   x = 2,167.82