Finding the Fourth Proportional to 12,888.18, 17,787.42 and 7,587.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,888.18 : 17,787.42 = 7,587.54 : x
2. Step 2: Convert to fraction form
   12,888.18/17,787.42 = 7,587.54/x
3. Step 3: Cross multiply
   12,888.18x = 17,787.42 × 7,587.54
4. Step 4: Simplify right side
   12,888.18x = 134,962,760.75
5. Step 5: Solve for x
   x = 134,962,760.75/12,888.18
6. Step 6: Final answer
   x = 10,471.82