Finding the Fourth Proportional to 20,962.64, 31,446.84 and 7,112.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,962.64 : 31,446.84 = 7,112.72 : x
2. Step 2: Convert to fraction form
   20,962.64/31,446.84 = 7,112.72/x
3. Step 3: Cross multiply
   20,962.64x = 31,446.84 × 7,112.72
4. Step 4: Simplify right side
   20,962.64x = 223,672,567.80
5. Step 5: Solve for x
   x = 223,672,567.80/20,962.64
6. Step 6: Final answer
   x = 10,670.06