Finding the Fourth Proportional to 2,109.25, 2,910.90 and 1,177.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.25 : 2,910.90 = 1,177.75 : x
2. Step 2: Convert to fraction form
   2,109.25/2,910.90 = 1,177.75/x
3. Step 3: Cross multiply
   2,109.25x = 2,910.90 × 1,177.75
4. Step 4: Simplify right side
   2,109.25x = 3,428,312.48
5. Step 5: Solve for x
   x = 3,428,312.48/2,109.25
6. Step 6: Final answer
   x = 1,625.37