Finding the Fourth Proportional to 12,718.72, 17,534.56 and 10,725.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,718.72 : 17,534.56 = 10,725.78 : x
2. Step 2: Convert to fraction form
   12,718.72/17,534.56 = 10,725.78/x
3. Step 3: Cross multiply
   12,718.72x = 17,534.56 × 10,725.78
4. Step 4: Simplify right side
   12,718.72x = 188,071,779.33
5. Step 5: Solve for x
   x = 188,071,779.33/12,718.72
6. Step 6: Final answer
   x = 14,787.01