Finding the Fourth Proportional to 1,363.55, 1,881.81 and 766.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,363.55 : 1,881.81 = 766.10 : x
2. Step 2: Convert to fraction form
   1,363.55/1,881.81 = 766.10/x
3. Step 3: Cross multiply
   1,363.55x = 1,881.81 × 766.10
4. Step 4: Simplify right side
   1,363.55x = 1,441,654.64
5. Step 5: Solve for x
   x = 1,441,654.64/1,363.55
6. Step 6: Final answer
   x = 1,057.28