Finding the Fourth Proportional to 1,147.12, 1,722.56 and 1,088.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.12 : 1,722.56 = 1,088.69 : x
2. Step 2: Convert to fraction form
   1,147.12/1,722.56 = 1,088.69/x
3. Step 3: Cross multiply
   1,147.12x = 1,722.56 × 1,088.69
4. Step 4: Simplify right side
   1,147.12x = 1,875,333.85
5. Step 5: Solve for x
   x = 1,875,333.85/1,147.12
6. Step 6: Final answer
   x = 1,634.82