Finding the Fourth Proportional to 1,077.35, 1,485.43 and 838.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,077.35 : 1,485.43 = 838.15 : x
2. Step 2: Convert to fraction form
   1,077.35/1,485.43 = 838.15/x
3. Step 3: Cross multiply
   1,077.35x = 1,485.43 × 838.15
4. Step 4: Simplify right side
   1,077.35x = 1,245,007.35
5. Step 5: Solve for x
   x = 1,245,007.35/1,077.35
6. Step 6: Final answer
   x = 1,155.63