Finding the Fourth Proportional to 1,809.76, 2,715.72 and 1,160.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,809.76 : 2,715.72 = 1,160.72 : x
2. Step 2: Convert to fraction form
   1,809.76/2,715.72 = 1,160.72/x
3. Step 3: Cross multiply
   1,809.76x = 2,715.72 × 1,160.72
4. Step 4: Simplify right side
   1,809.76x = 3,152,190.52
5. Step 5: Solve for x
   x = 3,152,190.52/1,809.76
6. Step 6: Final answer
   x = 1,741.77