Finding the Fourth Proportional to 2,152.77, 2,970.94 and 1,208.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.77 : 2,970.94 = 1,208.51 : x
2. Step 2: Convert to fraction form
   2,152.77/2,970.94 = 1,208.51/x
3. Step 3: Cross multiply
   2,152.77x = 2,970.94 × 1,208.51
4. Step 4: Simplify right side
   2,152.77x = 3,590,410.70
5. Step 5: Solve for x
   x = 3,590,410.70/2,152.77
6. Step 6: Final answer
   x = 1,667.81