Finding the Fourth Proportional to 9,928.32, 14,878.40 and 7,310.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,928.32 : 14,878.40 = 7,310.72 : x
2. Step 2: Convert to fraction form
   9,928.32/14,878.40 = 7,310.72/x
3. Step 3: Cross multiply
   9,928.32x = 14,878.40 × 7,310.72
4. Step 4: Simplify right side
   9,928.32x = 108,771,816.45
5. Step 5: Solve for x
   x = 108,771,816.45/9,928.32
6. Step 6: Final answer
   x = 10,955.71