Finding the Fourth Proportional to 1,366.18, 2,051.33 and 1,091.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.18 : 2,051.33 = 1,091.45 : x
2. Step 2: Convert to fraction form
   1,366.18/2,051.33 = 1,091.45/x
3. Step 3: Cross multiply
   1,366.18x = 2,051.33 × 1,091.45
4. Step 4: Simplify right side
   1,366.18x = 2,238,918.67
5. Step 5: Solve for x
   x = 2,238,918.67/1,366.18
6. Step 6: Final answer
   x = 1,638.82