Finding the Fourth Proportional to 1,890.16, 2,608.23 and 1,181.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.16 : 2,608.23 = 1,181.86 : x
2. Step 2: Convert to fraction form
   1,890.16/2,608.23 = 1,181.86/x
3. Step 3: Cross multiply
   1,890.16x = 2,608.23 × 1,181.86
4. Step 4: Simplify right side
   1,890.16x = 3,082,562.71
5. Step 5: Solve for x
   x = 3,082,562.71/1,890.16
6. Step 6: Final answer
   x = 1,630.85