Finding the Fourth Proportional to 1,122.72, 1,550.10 and 1,004.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,122.72 : 1,550.10 = 1,004.32 : x
2. Step 2: Convert to fraction form
   1,122.72/1,550.10 = 1,004.32/x
3. Step 3: Cross multiply
   1,122.72x = 1,550.10 × 1,004.32
4. Step 4: Simplify right side
   1,122.72x = 1,556,796.43
5. Step 5: Solve for x
   x = 1,556,796.43/1,122.72
6. Step 6: Final answer
   x = 1,386.63