Finding the Fourth Proportional to 1,812.33, 2,502.22 and 1,391.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,812.33 : 2,502.22 = 1,391.93 : x
2. Step 2: Convert to fraction form
   1,812.33/2,502.22 = 1,391.93/x
3. Step 3: Cross multiply
   1,812.33x = 2,502.22 × 1,391.93
4. Step 4: Simplify right side
   1,812.33x = 3,482,922.04
5. Step 5: Solve for x
   x = 3,482,922.04/1,812.33
6. Step 6: Final answer
   x = 1,921.79