Finding the Fourth Proportional to 1,423.05, 2,131.73 and 1,113.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.05 : 2,131.73 = 1,113.45 : x
2. Step 2: Convert to fraction form
   1,423.05/2,131.73 = 1,113.45/x
3. Step 3: Cross multiply
   1,423.05x = 2,131.73 × 1,113.45
4. Step 4: Simplify right side
   1,423.05x = 2,373,569.20
5. Step 5: Solve for x
   x = 2,373,569.20/1,423.05
6. Step 6: Final answer
   x = 1,667.95