Finding the Fourth Proportional to 2,117.34, 2,921.83 and 1,173.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.34 : 2,921.83 = 1,173.07 : x
2. Step 2: Convert to fraction form
   2,117.34/2,921.83 = 1,173.07/x
3. Step 3: Cross multiply
   2,117.34x = 2,921.83 × 1,173.07
4. Step 4: Simplify right side
   2,117.34x = 3,427,511.12
5. Step 5: Solve for x
   x = 3,427,511.12/2,117.34
6. Step 6: Final answer
   x = 1,618.78