Finding the Fourth Proportional to 2,072.42, 2,859.99 and 1,128.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.42 : 2,859.99 = 1,128.25 : x
2. Step 2: Convert to fraction form
   2,072.42/2,859.99 = 1,128.25/x
3. Step 3: Cross multiply
   2,072.42x = 2,859.99 × 1,128.25
4. Step 4: Simplify right side
   2,072.42x = 3,226,773.32
5. Step 5: Solve for x
   x = 3,226,773.32/2,072.42
6. Step 6: Final answer
   x = 1,557.01