Finding the Fourth Proportional to 38,658, 57,996.72 and 10,956

Step by Step Solution

1. Step 1: Write the proportion equation
   38,658 : 57,996.72 = 10,956 : x
2. Step 2: Convert to fraction form
   38,658/57,996.72 = 10,956/x
3. Step 3: Cross multiply
   38,658x = 57,996.72 × 10,956
4. Step 4: Simplify right side
   38,658x = 635,412,064.32
5. Step 5: Solve for x
   x = 635,412,064.32/38,658
6. Step 6: Final answer
   x = 16,436.75