Finding the Fourth Proportional to 13,012.42, 17,955.78 and 7,347.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,012.42 : 17,955.78 = 7,347.48 : x
2. Step 2: Convert to fraction form
   13,012.42/17,955.78 = 7,347.48/x
3. Step 3: Cross multiply
   13,012.42x = 17,955.78 × 7,347.48
4. Step 4: Simplify right side
   13,012.42x = 131,929,734.43
5. Step 5: Solve for x
   x = 131,929,734.43/13,012.42
6. Step 6: Final answer
   x = 10,138.75