Finding the Fourth Proportional to 1,377.67, 1,901.01 and 788.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.67 : 1,901.01 = 788.08 : x
2. Step 2: Convert to fraction form
   1,377.67/1,901.01 = 788.08/x
3. Step 3: Cross multiply
   1,377.67x = 1,901.01 × 788.08
4. Step 4: Simplify right side
   1,377.67x = 1,498,147.96
5. Step 5: Solve for x
   x = 1,498,147.96/1,377.67
6. Step 6: Final answer
   x = 1,087.45