Finding the Fourth Proportional to 1,140.86, 1,712.12 and 1,072.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,140.86 : 1,712.12 = 1,072.82 : x
2. Step 2: Convert to fraction form
   1,140.86/1,712.12 = 1,072.82/x
3. Step 3: Cross multiply
   1,140.86x = 1,712.12 × 1,072.82
4. Step 4: Simplify right side
   1,140.86x = 1,836,796.58
5. Step 5: Solve for x
   x = 1,836,796.58/1,140.86
6. Step 6: Final answer
   x = 1,610.01