Finding the Fourth Proportional to 2,109.39, 2,910.93 and 1,177.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.39 : 2,910.93 = 1,177.89 : x
2. Step 2: Convert to fraction form
   2,109.39/2,910.93 = 1,177.89/x
3. Step 3: Cross multiply
   2,109.39x = 2,910.93 × 1,177.89
4. Step 4: Simplify right side
   2,109.39x = 3,428,755.34
5. Step 5: Solve for x
   x = 3,428,755.34/2,109.39
6. Step 6: Final answer
   x = 1,625.47