Finding the Fourth Proportional to 2,980.58, 4,112.00 and 1,918.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,980.58 : 4,112.00 = 1,918.15 : x
2. Step 2: Convert to fraction form
   2,980.58/4,112.00 = 1,918.15/x
3. Step 3: Cross multiply
   2,980.58x = 4,112.00 × 1,918.15
4. Step 4: Simplify right side
   2,980.58x = 7,887,402.65
5. Step 5: Solve for x
   x = 7,887,402.65/2,980.58
6. Step 6: Final answer
   x = 2,646.26