Finding the Fourth Proportional to 1,111.84, 1,536.24 and 880.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.84 : 1,536.24 = 880.72 : x
2. Step 2: Convert to fraction form
   1,111.84/1,536.24 = 880.72/x
3. Step 3: Cross multiply
   1,111.84x = 1,536.24 × 880.72
4. Step 4: Simplify right side
   1,111.84x = 1,352,997.29
5. Step 5: Solve for x
   x = 1,352,997.29/1,111.84
6. Step 6: Final answer
   x = 1,216.90