Finding the Fourth Proportional to 1,930.31, 2,663.94 and 1,091.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,930.31 : 2,663.94 = 1,091.05 : x
2. Step 2: Convert to fraction form
   1,930.31/2,663.94 = 1,091.05/x
3. Step 3: Cross multiply
   1,930.31x = 2,663.94 × 1,091.05
4. Step 4: Simplify right side
   1,930.31x = 2,906,498.40
5. Step 5: Solve for x
   x = 2,906,498.40/1,930.31
6. Step 6: Final answer
   x = 1,505.71