Finding the Fourth Proportional to 1,147.06, 1,719.37 and 838.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.06 : 1,719.37 = 838.45 : x
2. Step 2: Convert to fraction form
   1,147.06/1,719.37 = 838.45/x
3. Step 3: Cross multiply
   1,147.06x = 1,719.37 × 838.45
4. Step 4: Simplify right side
   1,147.06x = 1,441,605.78
5. Step 5: Solve for x
   x = 1,441,605.78/1,147.06
6. Step 6: Final answer
   x = 1,256.78