Finding the Fourth Proportional to 2,156.62, 2,976.38 and 1,199.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.62 : 2,976.38 = 1,199.63 : x
2. Step 2: Convert to fraction form
   2,156.62/2,976.38 = 1,199.63/x
3. Step 3: Cross multiply
   2,156.62x = 2,976.38 × 1,199.63
4. Step 4: Simplify right side
   2,156.62x = 3,570,550.69
5. Step 5: Solve for x
   x = 3,570,550.69/2,156.62
6. Step 6: Final answer
   x = 1,655.62