Finding the Fourth Proportional to 1,072.48, 1,468.90 and 1,009.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.48 : 1,468.90 = 1,009.42 : x
2. Step 2: Convert to fraction form
   1,072.48/1,468.90 = 1,009.42/x
3. Step 3: Cross multiply
   1,072.48x = 1,468.90 × 1,009.42
4. Step 4: Simplify right side
   1,072.48x = 1,482,737.04
5. Step 5: Solve for x
   x = 1,482,737.04/1,072.48
6. Step 6: Final answer
   x = 1,382.53