Finding the Fourth Proportional to 1,113.02, 1,535.72 and 880.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,113.02 : 1,535.72 = 880.82 : x
2. Step 2: Convert to fraction form
   1,113.02/1,535.72 = 880.82/x
3. Step 3: Cross multiply
   1,113.02x = 1,535.72 × 880.82
4. Step 4: Simplify right side
   1,113.02x = 1,352,692.89
5. Step 5: Solve for x
   x = 1,352,692.89/1,113.02
6. Step 6: Final answer
   x = 1,215.34