Finding the Fourth Proportional to 1,100.88, 1,647.45 and 927.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.88 : 1,647.45 = 927.72 : x
2. Step 2: Convert to fraction form
   1,100.88/1,647.45 = 927.72/x
3. Step 3: Cross multiply
   1,100.88x = 1,647.45 × 927.72
4. Step 4: Simplify right side
   1,100.88x = 1,528,372.31
5. Step 5: Solve for x
   x = 1,528,372.31/1,100.88
6. Step 6: Final answer
   x = 1,388.32