Finding the Fourth Proportional to 2,145.02, 2,960.16 and 1,200.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.02 : 2,960.16 = 1,200.86 : x
2. Step 2: Convert to fraction form
   2,145.02/2,960.16 = 1,200.86/x
3. Step 3: Cross multiply
   2,145.02x = 2,960.16 × 1,200.86
4. Step 4: Simplify right side
   2,145.02x = 3,554,737.74
5. Step 5: Solve for x
   x = 3,554,737.74/2,145.02
6. Step 6: Final answer
   x = 1,657.20