Finding the Fourth Proportional to 31,611.57, 43,628.16 and 30,573.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,611.57 : 43,628.16 = 30,573.06 : x
2. Step 2: Convert to fraction form
   31,611.57/43,628.16 = 30,573.06/x
3. Step 3: Cross multiply
   31,611.57x = 43,628.16 × 30,573.06
4. Step 4: Simplify right side
   31,611.57x = 1,333,846,353.37
5. Step 5: Solve for x
   x = 1,333,846,353.37/31,611.57
6. Step 6: Final answer
   x = 42,194.88