Finding the Fourth Proportional to 2,501.80, 3,751.56 and 770.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,501.80 : 3,751.56 = 770.56 : x
2. Step 2: Convert to fraction form
   2,501.80/3,751.56 = 770.56/x
3. Step 3: Cross multiply
   2,501.80x = 3,751.56 × 770.56
4. Step 4: Simplify right side
   2,501.80x = 2,890,802.07
5. Step 5: Solve for x
   x = 2,890,802.07/2,501.80
6. Step 6: Final answer
   x = 1,155.49