Finding the Fourth Proportional to 2,051.53, 3,077.02 and 664.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.53 : 3,077.02 = 664.72 : x
2. Step 2: Convert to fraction form
   2,051.53/3,077.02 = 664.72/x
3. Step 3: Cross multiply
   2,051.53x = 3,077.02 × 664.72
4. Step 4: Simplify right side
   2,051.53x = 2,045,356.73
5. Step 5: Solve for x
   x = 2,045,356.73/2,051.53
6. Step 6: Final answer
   x = 996.99