Finding the Fourth Proportional to 1,809.78, 2,719.20 and 1,151.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,809.78 : 2,719.20 = 1,151.93 : x
2. Step 2: Convert to fraction form
   1,809.78/2,719.20 = 1,151.93/x
3. Step 3: Cross multiply
   1,809.78x = 2,719.20 × 1,151.93
4. Step 4: Simplify right side
   1,809.78x = 3,132,332.69
5. Step 5: Solve for x
   x = 3,132,332.69/1,809.78
6. Step 6: Final answer
   x = 1,730.78