Finding the Fourth Proportional to 2,156.13, 3,236.01 and 1,116.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.13 : 3,236.01 = 1,116.78 : x
2. Step 2: Convert to fraction form
   2,156.13/3,236.01 = 1,116.78/x
3. Step 3: Cross multiply
   2,156.13x = 3,236.01 × 1,116.78
4. Step 4: Simplify right side
   2,156.13x = 3,613,911.25
5. Step 5: Solve for x
   x = 3,613,911.25/2,156.13
6. Step 6: Final answer
   x = 1,676.11