Finding the Fourth Proportional to 1,437.89, 2,155.76 and 743.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.89 : 2,155.76 = 743.63 : x
2. Step 2: Convert to fraction form
   1,437.89/2,155.76 = 743.63/x
3. Step 3: Cross multiply
   1,437.89x = 2,155.76 × 743.63
4. Step 4: Simplify right side
   1,437.89x = 1,603,084.09
5. Step 5: Solve for x
   x = 1,603,084.09/1,437.89
6. Step 6: Final answer
   x = 1,114.89