Finding the Fourth Proportional to 1,088.72, 1,632.76 and 540.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.72 : 1,632.76 = 540.56 : x
2. Step 2: Convert to fraction form
   1,088.72/1,632.76 = 540.56/x
3. Step 3: Cross multiply
   1,088.72x = 1,632.76 × 540.56
4. Step 4: Simplify right side
   1,088.72x = 882,604.75
5. Step 5: Solve for x
   x = 882,604.75/1,088.72
6. Step 6: Final answer
   x = 810.68