Finding the Fourth Proportional to 2,492.89, 3,739.52 and 644.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,492.89 : 3,739.52 = 644.00 : x
2. Step 2: Convert to fraction form
   2,492.89/3,739.52 = 644.00/x
3. Step 3: Cross multiply
   2,492.89x = 3,739.52 × 644.00
4. Step 4: Simplify right side
   2,492.89x = 2,408,254.83
5. Step 5: Solve for x
   x = 2,408,254.83/2,492.89
6. Step 6: Final answer
   x = 966.05