Finding the Fourth Proportional to 1,877.50, 2,590.50 and 1,091.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,877.50 : 2,590.50 = 1,091.39 : x
2. Step 2: Convert to fraction form
   1,877.50/2,590.50 = 1,091.39/x
3. Step 3: Cross multiply
   1,877.50x = 2,590.50 × 1,091.39
4. Step 4: Simplify right side
   1,877.50x = 2,827,245.80
5. Step 5: Solve for x
   x = 2,827,245.80/1,877.50
6. Step 6: Final answer
   x = 1,505.86