Finding the Fourth Proportional to 2,112.12, 2,914.47 and 1,167.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.12 : 2,914.47 = 1,167.79 : x
2. Step 2: Convert to fraction form
   2,112.12/2,914.47 = 1,167.79/x
3. Step 3: Cross multiply
   2,112.12x = 2,914.47 × 1,167.79
4. Step 4: Simplify right side
   2,112.12x = 3,403,483.10
5. Step 5: Solve for x
   x = 3,403,483.10/2,112.12
6. Step 6: Final answer
   x = 1,611.40