Finding the Fourth Proportional to 1,941.12, 2,910.72 and 845.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,941.12 : 2,910.72 = 845.28 : x
2. Step 2: Convert to fraction form
   1,941.12/2,910.72 = 845.28/x
3. Step 3: Cross multiply
   1,941.12x = 2,910.72 × 845.28
4. Step 4: Simplify right side
   1,941.12x = 2,460,373.40
5. Step 5: Solve for x
   x = 2,460,373.40/1,941.12
6. Step 6: Final answer
   x = 1,267.50