Finding the Fourth Proportional to 2,979.02, 4,111.24 and 1,720.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,979.02 : 4,111.24 = 1,720.31 : x
2. Step 2: Convert to fraction form
   2,979.02/4,111.24 = 1,720.31/x
3. Step 3: Cross multiply
   2,979.02x = 4,111.24 × 1,720.31
4. Step 4: Simplify right side
   2,979.02x = 7,072,607.28
5. Step 5: Solve for x
   x = 7,072,607.28/2,979.02
6. Step 6: Final answer
   x = 2,374.14