Finding the Fourth Proportional to 1,377.17, 1,900.83 and 788.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.17 : 1,900.83 = 788.06 : x
2. Step 2: Convert to fraction form
   1,377.17/1,900.83 = 788.06/x
3. Step 3: Cross multiply
   1,377.17x = 1,900.83 × 788.06
4. Step 4: Simplify right side
   1,377.17x = 1,497,958.59
5. Step 5: Solve for x
   x = 1,497,958.59/1,377.17
6. Step 6: Final answer
   x = 1,087.71