Finding the Fourth Proportional to 1,300.89, 1,795.18 and 776.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.89 : 1,795.18 = 776.55 : x
2. Step 2: Convert to fraction form
   1,300.89/1,795.18 = 776.55/x
3. Step 3: Cross multiply
   1,300.89x = 1,795.18 × 776.55
4. Step 4: Simplify right side
   1,300.89x = 1,394,047.03
5. Step 5: Solve for x
   x = 1,394,047.03/1,300.89
6. Step 6: Final answer
   x = 1,071.61