Finding the Fourth Proportional to 1,019.91, 1,402.08 and 877.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.91 : 1,402.08 = 877.59 : x
2. Step 2: Convert to fraction form
   1,019.91/1,402.08 = 877.59/x
3. Step 3: Cross multiply
   1,019.91x = 1,402.08 × 877.59
4. Step 4: Simplify right side
   1,019.91x = 1,230,451.39
5. Step 5: Solve for x
   x = 1,230,451.39/1,019.91
6. Step 6: Final answer
   x = 1,206.43