Finding the Fourth Proportional to 2,142.62, 2,956.79 and 1,505.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.62 : 2,956.79 = 1,505.45 : x
2. Step 2: Convert to fraction form
   2,142.62/2,956.79 = 1,505.45/x
3. Step 3: Cross multiply
   2,142.62x = 2,956.79 × 1,505.45
4. Step 4: Simplify right side
   2,142.62x = 4,451,299.51
5. Step 5: Solve for x
   x = 4,451,299.51/2,142.62
6. Step 6: Final answer
   x = 2,077.50