Finding the Fourth Proportional to 1,357.55, 2,036.58 and 772.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.55 : 2,036.58 = 772.82 : x
2. Step 2: Convert to fraction form
   1,357.55/2,036.58 = 772.82/x
3. Step 3: Cross multiply
   1,357.55x = 2,036.58 × 772.82
4. Step 4: Simplify right side
   1,357.55x = 1,573,899.57
5. Step 5: Solve for x
   x = 1,573,899.57/1,357.55
6. Step 6: Final answer
   x = 1,159.37