Finding the Fourth Proportional to 1,004.32, 1,507.56 and 889.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.32 : 1,507.56 = 889.48 : x
2. Step 2: Convert to fraction form
   1,004.32/1,507.56 = 889.48/x
3. Step 3: Cross multiply
   1,004.32x = 1,507.56 × 889.48
4. Step 4: Simplify right side
   1,004.32x = 1,340,944.47
5. Step 5: Solve for x
   x = 1,340,944.47/1,004.32
6. Step 6: Final answer
   x = 1,335.18