Finding the Fourth Proportional to 2,385.56, 3,290.64 and 1,723.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.56 : 3,290.64 = 1,723.88 : x
2. Step 2: Convert to fraction form
   2,385.56/3,290.64 = 1,723.88/x
3. Step 3: Cross multiply
   2,385.56x = 3,290.64 × 1,723.88
4. Step 4: Simplify right side
   2,385.56x = 5,672,668.48
5. Step 5: Solve for x
   x = 5,672,668.48/2,385.56
6. Step 6: Final answer
   x = 2,377.92