Finding the Fourth Proportional to 3,938.55, 5,903.78 and 1,748.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.55 : 5,903.78 = 1,748.31 : x
2. Step 2: Convert to fraction form
   3,938.55/5,903.78 = 1,748.31/x
3. Step 3: Cross multiply
   3,938.55x = 5,903.78 × 1,748.31
4. Step 4: Simplify right side
   3,938.55x = 10,321,637.61
5. Step 5: Solve for x
   x = 10,321,637.61/3,938.55
6. Step 6: Final answer
   x = 2,620.67