Finding the Fourth Proportional to 1,105.32, 1,525.17 and 712.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.32 : 1,525.17 = 712.88 : x
2. Step 2: Convert to fraction form
   1,105.32/1,525.17 = 712.88/x
3. Step 3: Cross multiply
   1,105.32x = 1,525.17 × 712.88
4. Step 4: Simplify right side
   1,105.32x = 1,087,255.56
5. Step 5: Solve for x
   x = 1,087,255.56/1,105.32
6. Step 6: Final answer
   x = 983.66