Finding the Fourth Proportional to 1,540.47, 2,123.37 and 1,069.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,540.47 : 2,123.37 = 1,069.05 : x
2. Step 2: Convert to fraction form
   1,540.47/2,123.37 = 1,069.05/x
3. Step 3: Cross multiply
   1,540.47x = 2,123.37 × 1,069.05
4. Step 4: Simplify right side
   1,540.47x = 2,269,988.70
5. Step 5: Solve for x
   x = 2,269,988.70/1,540.47
6. Step 6: Final answer
   x = 1,473.57