Finding the Fourth Proportional to 1,355.42, 1,870.46 and 766.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.42 : 1,870.46 = 766.08 : x
2. Step 2: Convert to fraction form
   1,355.42/1,870.46 = 766.08/x
3. Step 3: Cross multiply
   1,355.42x = 1,870.46 × 766.08
4. Step 4: Simplify right side
   1,355.42x = 1,432,922.00
5. Step 5: Solve for x
   x = 1,432,922.00/1,355.42
6. Step 6: Final answer
   x = 1,057.18