Finding the Fourth Proportional to 2,120.81, 2,926.76 and 1,176.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.81 : 2,926.76 = 1,176.55 : x
2. Step 2: Convert to fraction form
   2,120.81/2,926.76 = 1,176.55/x
3. Step 3: Cross multiply
   2,120.81x = 2,926.76 × 1,176.55
4. Step 4: Simplify right side
   2,120.81x = 3,443,466.28
5. Step 5: Solve for x
   x = 3,443,466.28/2,120.81
6. Step 6: Final answer
   x = 1,623.66