Finding the Fourth Proportional to 1,815.76, 2,505.72 and 1,069.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.76 : 2,505.72 = 1,069.62 : x
2. Step 2: Convert to fraction form
   1,815.76/2,505.72 = 1,069.62/x
3. Step 3: Cross multiply
   1,815.76x = 2,505.72 × 1,069.62
4. Step 4: Simplify right side
   1,815.76x = 2,680,168.23
5. Step 5: Solve for x
   x = 2,680,168.23/1,815.76
6. Step 6: Final answer
   x = 1,476.06