Finding the Fourth Proportional to 2,142.61, 2,957.78 and 1,557.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.61 : 2,957.78 = 1,557.59 : x
2. Step 2: Convert to fraction form
   2,142.61/2,957.78 = 1,557.59/x
3. Step 3: Cross multiply
   2,142.61x = 2,957.78 × 1,557.59
4. Step 4: Simplify right side
   2,142.61x = 4,606,997.66
5. Step 5: Solve for x
   x = 4,606,997.66/2,142.61
6. Step 6: Final answer
   x = 2,150.18