Finding the Fourth Proportional to 2,979.30, 4,109.05 and 1,858.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,979.30 : 4,109.05 = 1,858.10 : x
2. Step 2: Convert to fraction form
   2,979.30/4,109.05 = 1,858.10/x
3. Step 3: Cross multiply
   2,979.30x = 4,109.05 × 1,858.10
4. Step 4: Simplify right side
   2,979.30x = 7,635,025.81
5. Step 5: Solve for x
   x = 7,635,025.81/2,979.30
6. Step 6: Final answer
   x = 2,562.69