Finding the Fourth Proportional to 1,285.55, 1,935.34 and 877.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,285.55 : 1,935.34 = 877.27 : x
2. Step 2: Convert to fraction form
   1,285.55/1,935.34 = 877.27/x
3. Step 3: Cross multiply
   1,285.55x = 1,935.34 × 877.27
4. Step 4: Simplify right side
   1,285.55x = 1,697,808.69
5. Step 5: Solve for x
   x = 1,697,808.69/1,285.55
6. Step 6: Final answer
   x = 1,320.69