Finding the Fourth Proportional to 28,630.72, 42,948.96 and 10,623.88

Step by Step Solution

1. Step 1: Write the proportion equation
   28,630.72 : 42,948.96 = 10,623.88 : x
2. Step 2: Convert to fraction form
   28,630.72/42,948.96 = 10,623.88/x
3. Step 3: Cross multiply
   28,630.72x = 42,948.96 × 10,623.88
4. Step 4: Simplify right side
   28,630.72x = 456,284,597.16
5. Step 5: Solve for x
   x = 456,284,597.16/28,630.72
6. Step 6: Final answer
   x = 15,936.89