Finding the Fourth Proportional to 1,595.75, 2,391.53 and 772.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,595.75 : 2,391.53 = 772.89 : x
2. Step 2: Convert to fraction form
   1,595.75/2,391.53 = 772.89/x
3. Step 3: Cross multiply
   1,595.75x = 2,391.53 × 772.89
4. Step 4: Simplify right side
   1,595.75x = 1,848,385.76
5. Step 5: Solve for x
   x = 1,848,385.76/1,595.75
6. Step 6: Final answer
   x = 1,158.32