Finding the Fourth Proportional to 1,061.81, 1,581.77 and 1,029.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.81 : 1,581.77 = 1,029.57 : x
2. Step 2: Convert to fraction form
   1,061.81/1,581.77 = 1,029.57/x
3. Step 3: Cross multiply
   1,061.81x = 1,581.77 × 1,029.57
4. Step 4: Simplify right side
   1,061.81x = 1,628,537.79
5. Step 5: Solve for x
   x = 1,628,537.79/1,061.81
6. Step 6: Final answer
   x = 1,533.74