Finding the Fourth Proportional to 2,748.87, 4,123.89 and 800.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,748.87 : 4,123.89 = 800.91 : x
2. Step 2: Convert to fraction form
   2,748.87/4,123.89 = 800.91/x
3. Step 3: Cross multiply
   2,748.87x = 4,123.89 × 800.91
4. Step 4: Simplify right side
   2,748.87x = 3,302,864.74
5. Step 5: Solve for x
   x = 3,302,864.74/2,748.87
6. Step 6: Final answer
   x = 1,201.54