Finding the Fourth Proportional to 2,056.86, 3,079.01 and 1,663.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.86 : 3,079.01 = 1,663.20 : x
2. Step 2: Convert to fraction form
   2,056.86/3,079.01 = 1,663.20/x
3. Step 3: Cross multiply
   2,056.86x = 3,079.01 × 1,663.20
4. Step 4: Simplify right side
   2,056.86x = 5,121,013.59
5. Step 5: Solve for x
   x = 5,121,013.59/2,056.86
6. Step 6: Final answer
   x = 2,489.72