Finding the Fourth Proportional to 1,815.74, 2,505.61 and 1,069.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.74 : 2,505.61 = 1,069.52 : x
2. Step 2: Convert to fraction form
   1,815.74/2,505.61 = 1,069.52/x
3. Step 3: Cross multiply
   1,815.74x = 2,505.61 × 1,069.52
4. Step 4: Simplify right side
   1,815.74x = 2,679,803.60
5. Step 5: Solve for x
   x = 2,679,803.60/1,815.74
6. Step 6: Final answer
   x = 1,475.88