Finding the Fourth Proportional to 2,152.77, 3,212.52 and 1,919.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.77 : 3,212.52 = 1,919.81 : x
2. Step 2: Convert to fraction form
   2,152.77/3,212.52 = 1,919.81/x
3. Step 3: Cross multiply
   2,152.77x = 3,212.52 × 1,919.81
4. Step 4: Simplify right side
   2,152.77x = 6,167,428.02
5. Step 5: Solve for x
   x = 6,167,428.02/2,152.77
6. Step 6: Final answer
   x = 2,864.88