Finding the Fourth Proportional to 31,612.57, 43,629.54 and 30,574.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,612.57 : 43,629.54 = 30,574.06 : x
2. Step 2: Convert to fraction form
   31,612.57/43,629.54 = 30,574.06/x
3. Step 3: Cross multiply
   31,612.57x = 43,629.54 × 30,574.06
4. Step 4: Simplify right side
   31,612.57x = 1,333,932,173.73
5. Step 5: Solve for x
   x = 1,333,932,173.73/31,612.57
6. Step 6: Final answer
   x = 42,196.26