Finding the Fourth Proportional to 2,152.86, 2,970.69 and 1,208.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.86 : 2,970.69 = 1,208.45 : x
2. Step 2: Convert to fraction form
   2,152.86/2,970.69 = 1,208.45/x
3. Step 3: Cross multiply
   2,152.86x = 2,970.69 × 1,208.45
4. Step 4: Simplify right side
   2,152.86x = 3,589,915.48
5. Step 5: Solve for x
   x = 3,589,915.48/2,152.86
6. Step 6: Final answer
   x = 1,667.51