Finding the Fourth Proportional to 1,401.93, 1,930.23 and 1,191.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.93 : 1,930.23 = 1,191.69 : x
2. Step 2: Convert to fraction form
   1,401.93/1,930.23 = 1,191.69/x
3. Step 3: Cross multiply
   1,401.93x = 1,930.23 × 1,191.69
4. Step 4: Simplify right side
   1,401.93x = 2,300,235.79
5. Step 5: Solve for x
   x = 2,300,235.79/1,401.93
6. Step 6: Final answer
   x = 1,640.76