Finding the Fourth Proportional to 13,012.48, 17,957.56 and 7,705.36

Step by Step Solution

1. Step 1: Write the proportion equation
   13,012.48 : 17,957.56 = 7,705.36 : x
2. Step 2: Convert to fraction form
   13,012.48/17,957.56 = 7,705.36/x
3. Step 3: Cross multiply
   13,012.48x = 17,957.56 × 7,705.36
4. Step 4: Simplify right side
   13,012.48x = 138,369,464.52
5. Step 5: Solve for x
   x = 138,369,464.52/13,012.48
6. Step 6: Final answer
   x = 10,633.60