Finding the Fourth Proportional to 31,559.49, 43,463.49 and 30,870.59

Step by Step Solution

1. Step 1: Write the proportion equation
   31,559.49 : 43,463.49 = 30,870.59 : x
2. Step 2: Convert to fraction form
   31,559.49/43,463.49 = 30,870.59/x
3. Step 3: Cross multiply
   31,559.49x = 43,463.49 × 30,870.59
4. Step 4: Simplify right side
   31,559.49x = 1,341,743,246.68
5. Step 5: Solve for x
   x = 1,341,743,246.68/31,559.49
6. Step 6: Final answer
   x = 42,514.73