Finding the Fourth Proportional to 3,581.89, 5,374.69 and 2,602.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,581.89 : 5,374.69 = 2,602.78 : x
2. Step 2: Convert to fraction form
   3,581.89/5,374.69 = 2,602.78/x
3. Step 3: Cross multiply
   3,581.89x = 5,374.69 × 2,602.78
4. Step 4: Simplify right side
   3,581.89x = 13,989,115.69
5. Step 5: Solve for x
   x = 13,989,115.69/3,581.89
6. Step 6: Final answer
   x = 3,905.52