Finding the Fourth Proportional to 1,338.98, 1,849.31 and 1,091.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.98 : 1,849.31 = 1,091.57 : x
2. Step 2: Convert to fraction form
   1,338.98/1,849.31 = 1,091.57/x
3. Step 3: Cross multiply
   1,338.98x = 1,849.31 × 1,091.57
4. Step 4: Simplify right side
   1,338.98x = 2,018,636.61
5. Step 5: Solve for x
   x = 2,018,636.61/1,338.98
6. Step 6: Final answer
   x = 1,507.60