Finding the Fourth Proportional to 2,117.80, 2,922.43 and 1,173.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.80 : 2,922.43 = 1,173.56 : x
2. Step 2: Convert to fraction form
   2,117.80/2,922.43 = 1,173.56/x
3. Step 3: Cross multiply
   2,117.80x = 2,922.43 × 1,173.56
4. Step 4: Simplify right side
   2,117.80x = 3,429,631.61
5. Step 5: Solve for x
   x = 3,429,631.61/2,117.80
6. Step 6: Final answer
   x = 1,619.43