Finding the Fourth Proportional to 1,377.81, 1,900.89 and 880.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.81 : 1,900.89 = 880.68 : x
2. Step 2: Convert to fraction form
   1,377.81/1,900.89 = 880.68/x
3. Step 3: Cross multiply
   1,377.81x = 1,900.89 × 880.68
4. Step 4: Simplify right side
   1,377.81x = 1,674,075.81
5. Step 5: Solve for x
   x = 1,674,075.81/1,377.81
6. Step 6: Final answer
   x = 1,215.03