Finding the Fourth Proportional to 2,543.57, 3,814.89 and 900.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.57 : 3,814.89 = 900.12 : x
2. Step 2: Convert to fraction form
   2,543.57/3,814.89 = 900.12/x
3. Step 3: Cross multiply
   2,543.57x = 3,814.89 × 900.12
4. Step 4: Simplify right side
   2,543.57x = 3,433,858.79
5. Step 5: Solve for x
   x = 3,433,858.79/2,543.57
6. Step 6: Final answer
   x = 1,350.02