Finding the Fourth Proportional to 2,978.93, 4,109.06 and 1,918.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.93 : 4,109.06 = 1,918.08 : x
2. Step 2: Convert to fraction form
   2,978.93/4,109.06 = 1,918.08/x
3. Step 3: Cross multiply
   2,978.93x = 4,109.06 × 1,918.08
4. Step 4: Simplify right side
   2,978.93x = 7,881,510.60
5. Step 5: Solve for x
   x = 7,881,510.60/2,978.93
6. Step 6: Final answer
   x = 2,645.75