Finding the Fourth Proportional to 1,680.93, 2,320.65 and 1,123.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.93 : 2,320.65 = 1,123.25 : x
2. Step 2: Convert to fraction form
   1,680.93/2,320.65 = 1,123.25/x
3. Step 3: Cross multiply
   1,680.93x = 2,320.65 × 1,123.25
4. Step 4: Simplify right side
   1,680.93x = 2,606,658.51
5. Step 5: Solve for x
   x = 2,606,658.51/1,680.93
6. Step 6: Final answer
   x = 1,550.72