Finding the Fourth Proportional to 1,336.42, 2,001.91 and 1,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.42 : 2,001.91 = 1,090.50 : x
2. Step 2: Convert to fraction form
   1,336.42/2,001.91 = 1,090.50/x
3. Step 3: Cross multiply
   1,336.42x = 2,001.91 × 1,090.50
4. Step 4: Simplify right side
   1,336.42x = 2,183,082.86
5. Step 5: Solve for x
   x = 2,183,082.86/1,336.42
6. Step 6: Final answer
   x = 1,633.53