Finding the Fourth Proportional to 70,624.72, 105,910.16 and 20,694.16

Step by Step Solution

1. Step 1: Write the proportion equation
   70,624.72 : 105,910.16 = 20,694.16 : x
2. Step 2: Convert to fraction form
   70,624.72/105,910.16 = 20,694.16/x
3. Step 3: Cross multiply
   70,624.72x = 105,910.16 × 20,694.16
4. Step 4: Simplify right side
   70,624.72x = 2,191,721,796.67
5. Step 5: Solve for x
   x = 2,191,721,796.67/70,624.72
6. Step 6: Final answer
   x = 31,033.35