Finding the Fourth Proportional to 2,991.64, 4,486.77 and 882.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,991.64 : 4,486.77 = 882.72 : x
2. Step 2: Convert to fraction form
   2,991.64/4,486.77 = 882.72/x
3. Step 3: Cross multiply
   2,991.64x = 4,486.77 × 882.72
4. Step 4: Simplify right side
   2,991.64x = 3,960,561.61
5. Step 5: Solve for x
   x = 3,960,561.61/2,991.64
6. Step 6: Final answer
   x = 1,323.88