Finding the Fourth Proportional to 1,557.96, 2,150.01 and 859.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557.96 : 2,150.01 = 859.34 : x
2. Step 2: Convert to fraction form
   1,557.96/2,150.01 = 859.34/x
3. Step 3: Cross multiply
   1,557.96x = 2,150.01 × 859.34
4. Step 4: Simplify right side
   1,557.96x = 1,847,589.59
5. Step 5: Solve for x
   x = 1,847,589.59/1,557.96
6. Step 6: Final answer
   x = 1,185.90