Finding the Fourth Proportional to 2,875.71, 3,968.69 and 2,119.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,875.71 : 3,968.69 = 2,119.80 : x
2. Step 2: Convert to fraction form
   2,875.71/3,968.69 = 2,119.80/x
3. Step 3: Cross multiply
   2,875.71x = 3,968.69 × 2,119.80
4. Step 4: Simplify right side
   2,875.71x = 8,412,818.46
5. Step 5: Solve for x
   x = 8,412,818.46/2,875.71
6. Step 6: Final answer
   x = 2,925.48