Finding the Fourth Proportional to 2,978.88, 4,111.03 and 1,720.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.88 : 4,111.03 = 1,720.16 : x
2. Step 2: Convert to fraction form
   2,978.88/4,111.03 = 1,720.16/x
3. Step 3: Cross multiply
   2,978.88x = 4,111.03 × 1,720.16
4. Step 4: Simplify right side
   2,978.88x = 7,071,629.36
5. Step 5: Solve for x
   x = 7,071,629.36/2,978.88
6. Step 6: Final answer
   x = 2,373.92