Finding the Fourth Proportional to 2,939.47, 4,054.93 and 1,820.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,939.47 : 4,054.93 = 1,820.05 : x
2. Step 2: Convert to fraction form
   2,939.47/4,054.93 = 1,820.05/x
3. Step 3: Cross multiply
   2,939.47x = 4,054.93 × 1,820.05
4. Step 4: Simplify right side
   2,939.47x = 7,380,175.35
5. Step 5: Solve for x
   x = 7,380,175.35/2,939.47
6. Step 6: Final answer
   x = 2,510.72