Finding the Fourth Proportional to 2,172.32, 3,261.20 and 1,738.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.32 : 3,261.20 = 1,738.96 : x
2. Step 2: Convert to fraction form
   2,172.32/3,261.20 = 1,738.96/x
3. Step 3: Cross multiply
   2,172.32x = 3,261.20 × 1,738.96
4. Step 4: Simplify right side
   2,172.32x = 5,671,096.35
5. Step 5: Solve for x
   x = 5,671,096.35/2,172.32
6. Step 6: Final answer
   x = 2,610.62