Finding the Fourth Proportional to 2,543.89, 3,816.84 and 900.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,543.89 : 3,816.84 = 900.61 : x
2. Step 2: Convert to fraction form
   2,543.89/3,816.84 = 900.61/x
3. Step 3: Cross multiply
   2,543.89x = 3,816.84 × 900.61
4. Step 4: Simplify right side
   2,543.89x = 3,437,484.27
5. Step 5: Solve for x
   x = 3,437,484.27/2,543.89
6. Step 6: Final answer
   x = 1,351.27