Finding the Fourth Proportional to 2,969.09, 4,100.58 and 1,978.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,969.09 : 4,100.58 = 1,978.57 : x
2. Step 2: Convert to fraction form
   2,969.09/4,100.58 = 1,978.57/x
3. Step 3: Cross multiply
   2,969.09x = 4,100.58 × 1,978.57
4. Step 4: Simplify right side
   2,969.09x = 8,113,274.32
5. Step 5: Solve for x
   x = 8,113,274.32/2,969.09
6. Step 6: Final answer
   x = 2,732.58