Finding the Fourth Proportional to 31,608.56, 43,624 and 30,570.08

Step by Step Solution

1. Step 1: Write the proportion equation
   31,608.56 : 43,624 = 30,570.08 : x
2. Step 2: Convert to fraction form
   31,608.56/43,624 = 30,570.08/x
3. Step 3: Cross multiply
   31,608.56x = 43,624 × 30,570.08
4. Step 4: Simplify right side
   31,608.56x = 1,333,589,169.92
5. Step 5: Solve for x
   x = 1,333,589,169.92/31,608.56
6. Step 6: Final answer
   x = 42,190.76