Finding the Fourth Proportional to 1,065.42, 1,587.33 and 1,061.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.42 : 1,587.33 = 1,061.10 : x
2. Step 2: Convert to fraction form
   1,065.42/1,587.33 = 1,061.10/x
3. Step 3: Cross multiply
   1,065.42x = 1,587.33 × 1,061.10
4. Step 4: Simplify right side
   1,065.42x = 1,684,315.86
5. Step 5: Solve for x
   x = 1,684,315.86/1,065.42
6. Step 6: Final answer
   x = 1,580.89