Finding the Fourth Proportional to 12,648.96, 17,455.50 and 7,345.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.96 : 17,455.50 = 7,345.08 : x
2. Step 2: Convert to fraction form
   12,648.96/17,455.50 = 7,345.08/x
3. Step 3: Cross multiply
   12,648.96x = 17,455.50 × 7,345.08
4. Step 4: Simplify right side
   12,648.96x = 128,212,043.94
5. Step 5: Solve for x
   x = 128,212,043.94/12,648.96
6. Step 6: Final answer
   x = 10,136.17