Finding the Fourth Proportional to 2,146.76, 3,196.20 and 2,120.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,146.76 : 3,196.20 = 2,120.84 : x
2. Step 2: Convert to fraction form
   2,146.76/3,196.20 = 2,120.84/x
3. Step 3: Cross multiply
   2,146.76x = 3,196.20 × 2,120.84
4. Step 4: Simplify right side
   2,146.76x = 6,778,628.81
5. Step 5: Solve for x
   x = 6,778,628.81/2,146.76
6. Step 6: Final answer
   x = 3,157.61