Finding the Fourth Proportional to 1,938.67, 2,675.60 and 1,153.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,938.67 : 2,675.60 = 1,153.15 : x
2. Step 2: Convert to fraction form
   1,938.67/2,675.60 = 1,153.15/x
3. Step 3: Cross multiply
   1,938.67x = 2,675.60 × 1,153.15
4. Step 4: Simplify right side
   1,938.67x = 3,085,362.37
5. Step 5: Solve for x
   x = 3,085,362.37/1,938.67
6. Step 6: Final answer
   x = 1,591.48