Finding the Fourth Proportional to 1,658.72, 2,475.72 and 1,393.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,658.72 : 2,475.72 = 1,393.76 : x
2. Step 2: Convert to fraction form
   1,658.72/2,475.72 = 1,393.76/x
3. Step 3: Cross multiply
   1,658.72x = 2,475.72 × 1,393.76
4. Step 4: Simplify right side
   1,658.72x = 3,450,559.51
5. Step 5: Solve for x
   x = 3,450,559.51/1,658.72
6. Step 6: Final answer
   x = 2,080.25