Finding the Fourth Proportional to 2,978.72, 4,110.83 and 1,720.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.72 : 4,110.83 = 1,720.01 : x
2. Step 2: Convert to fraction form
   2,978.72/4,110.83 = 1,720.01/x
3. Step 3: Cross multiply
   2,978.72x = 4,110.83 × 1,720.01
4. Step 4: Simplify right side
   2,978.72x = 7,070,660.44
5. Step 5: Solve for x
   x = 7,070,660.44/2,978.72
6. Step 6: Final answer
   x = 2,373.72