Finding the Fourth Proportional to 1,357.72, 1,873.64 and 768.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.72 : 1,873.64 = 768.12 : x
2. Step 2: Convert to fraction form
   1,357.72/1,873.64 = 768.12/x
3. Step 3: Cross multiply
   1,357.72x = 1,873.64 × 768.12
4. Step 4: Simplify right side
   1,357.72x = 1,439,180.36
5. Step 5: Solve for x
   x = 1,439,180.36/1,357.72
6. Step 6: Final answer
   x = 1,060.00