Finding the Fourth Proportional to 2,991.34, 4,485.39 and 1,042.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,991.34 : 4,485.39 = 1,042.75 : x
2. Step 2: Convert to fraction form
   2,991.34/4,485.39 = 1,042.75/x
3. Step 3: Cross multiply
   2,991.34x = 4,485.39 × 1,042.75
4. Step 4: Simplify right side
   2,991.34x = 4,677,140.42
5. Step 5: Solve for x
   x = 4,677,140.42/2,991.34
6. Step 6: Final answer
   x = 1,563.56