Finding the Fourth Proportional to 2,117.74, 2,922.40 and 1,173.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.74 : 2,922.40 = 1,173.57 : x
2. Step 2: Convert to fraction form
   2,117.74/2,922.40 = 1,173.57/x
3. Step 3: Cross multiply
   2,117.74x = 2,922.40 × 1,173.57
4. Step 4: Simplify right side
   2,117.74x = 3,429,642.43
5. Step 5: Solve for x
   x = 3,429,642.43/2,117.74
6. Step 6: Final answer
   x = 1,619.48