Finding the Fourth Proportional to 2,111.62, 2,913.99 and 1,167.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.62 : 2,913.99 = 1,167.45 : x
2. Step 2: Convert to fraction form
   2,111.62/2,913.99 = 1,167.45/x
3. Step 3: Cross multiply
   2,111.62x = 2,913.99 × 1,167.45
4. Step 4: Simplify right side
   2,111.62x = 3,401,952.86
5. Step 5: Solve for x
   x = 3,401,952.86/2,111.62
6. Step 6: Final answer
   x = 1,611.06