Finding the Fourth Proportional to 1,930.80, 2,664.78 and 1,091.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,930.80 : 2,664.78 = 1,091.76 : x
2. Step 2: Convert to fraction form
   1,930.80/2,664.78 = 1,091.76/x
3. Step 3: Cross multiply
   1,930.80x = 2,664.78 × 1,091.76
4. Step 4: Simplify right side
   1,930.80x = 2,909,300.21
5. Step 5: Solve for x
   x = 2,909,300.21/1,930.80
6. Step 6: Final answer
   x = 1,506.78