Finding the Fourth Proportional to 2,543.76, 3,815.76 and 900.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.76 : 3,815.76 = 900.48 : x
2. Step 2: Convert to fraction form
   2,543.76/3,815.76 = 900.48/x
3. Step 3: Cross multiply
   2,543.76x = 3,815.76 × 900.48
4. Step 4: Simplify right side
   2,543.76x = 3,436,015.56
5. Step 5: Solve for x
   x = 3,436,015.56/2,543.76
6. Step 6: Final answer
   x = 1,350.76