Finding the Fourth Proportional to 1,355.73, 1,870.93 and 766.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355.73 : 1,870.93 = 766.32 : x
2. Step 2: Convert to fraction form
   1,355.73/1,870.93 = 766.32/x
3. Step 3: Cross multiply
   1,355.73x = 1,870.93 × 766.32
4. Step 4: Simplify right side
   1,355.73x = 1,433,731.08
5. Step 5: Solve for x
   x = 1,433,731.08/1,355.73
6. Step 6: Final answer
   x = 1,057.53