Finding the Fourth Proportional to 1,065.13, 1,605.33 and 1,005.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.13 : 1,605.33 = 1,005.59 : x
2. Step 2: Convert to fraction form
   1,065.13/1,605.33 = 1,005.59/x
3. Step 3: Cross multiply
   1,065.13x = 1,605.33 × 1,005.59
4. Step 4: Simplify right side
   1,065.13x = 1,614,303.79
5. Step 5: Solve for x
   x = 1,614,303.79/1,065.13
6. Step 6: Final answer
   x = 1,515.59