Finding the Fourth Proportional to 1,068.42, 1,605.20 and 1,009.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.42 : 1,605.20 = 1,009.41 : x
2. Step 2: Convert to fraction form
   1,068.42/1,605.20 = 1,009.41/x
3. Step 3: Cross multiply
   1,068.42x = 1,605.20 × 1,009.41
4. Step 4: Simplify right side
   1,068.42x = 1,620,308.83
5. Step 5: Solve for x
   x = 1,620,308.83/1,068.42
6. Step 6: Final answer
   x = 1,516.55