Finding the Fourth Proportional to 2,478.21, 3,417.37 and 1,731.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.21 : 3,417.37 = 1,731.89 : x
2. Step 2: Convert to fraction form
   2,478.21/3,417.37 = 1,731.89/x
3. Step 3: Cross multiply
   2,478.21x = 3,417.37 × 1,731.89
4. Step 4: Simplify right side
   2,478.21x = 5,918,522.88
5. Step 5: Solve for x
   x = 5,918,522.88/2,478.21
6. Step 6: Final answer
   x = 2,388.23