Finding the Fourth Proportional to 1,728.42, 2,378.00 and 1,507.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.42 : 2,378.00 = 1,507.91 : x
2. Step 2: Convert to fraction form
   1,728.42/2,378.00 = 1,507.91/x
3. Step 3: Cross multiply
   1,728.42x = 2,378.00 × 1,507.91
4. Step 4: Simplify right side
   1,728.42x = 3,585,790.55
5. Step 5: Solve for x
   x = 3,585,790.55/1,728.42
6. Step 6: Final answer
   x = 2,074.61