Finding the Fourth Proportional to 1,357.02, 1,872.72 and 767.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.02 : 1,872.72 = 767.55 : x
2. Step 2: Convert to fraction form
   1,357.02/1,872.72 = 767.55/x
3. Step 3: Cross multiply
   1,357.02x = 1,872.72 × 767.55
4. Step 4: Simplify right side
   1,357.02x = 1,437,406.24
5. Step 5: Solve for x
   x = 1,437,406.24/1,357.02
6. Step 6: Final answer
   x = 1,059.24