Finding the Fourth Proportional to 3,612.06, 4,985.69 and 2,120.04

Step by Step Solution

1. Step 1: Write the proportion equation
   3,612.06 : 4,985.69 = 2,120.04 : x
2. Step 2: Convert to fraction form
   3,612.06/4,985.69 = 2,120.04/x
3. Step 3: Cross multiply
   3,612.06x = 4,985.69 × 2,120.04
4. Step 4: Simplify right side
   3,612.06x = 10,569,851.63
5. Step 5: Solve for x
   x = 10,569,851.63/3,612.06
6. Step 6: Final answer
   x = 2,926.27