Finding the Fourth Proportional to 2,991.88, 4,488.42 and 1,260.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,991.88 : 4,488.42 = 1,260.50 : x
2. Step 2: Convert to fraction form
   2,991.88/4,488.42 = 1,260.50/x
3. Step 3: Cross multiply
   2,991.88x = 4,488.42 × 1,260.50
4. Step 4: Simplify right side
   2,991.88x = 5,657,653.41
5. Step 5: Solve for x
   x = 5,657,653.41/2,991.88
6. Step 6: Final answer
   x = 1,891.00