Finding the Fourth Proportional to 2,430.47, 3,355.31 and 1,722.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,430.47 : 3,355.31 = 1,722.89 : x
2. Step 2: Convert to fraction form
   2,430.47/3,355.31 = 1,722.89/x
3. Step 3: Cross multiply
   2,430.47x = 3,355.31 × 1,722.89
4. Step 4: Simplify right side
   2,430.47x = 5,780,830.05
5. Step 5: Solve for x
   x = 5,780,830.05/2,430.47
6. Step 6: Final answer
   x = 2,378.48