Finding the Fourth Proportional to 2,111.53, 2,913.83 and 1,167.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.53 : 2,913.83 = 1,167.30 : x
2. Step 2: Convert to fraction form
   2,111.53/2,913.83 = 1,167.30/x
3. Step 3: Cross multiply
   2,111.53x = 2,913.83 × 1,167.30
4. Step 4: Simplify right side
   2,111.53x = 3,401,313.76
5. Step 5: Solve for x
   x = 3,401,313.76/2,111.53
6. Step 6: Final answer
   x = 1,610.83