Finding the Fourth Proportional to 74,472.57, 111,788.43 and 30,128.31

Step by Step Solution

1. Step 1: Write the proportion equation
   74,472.57 : 111,788.43 = 30,128.31 : x
2. Step 2: Convert to fraction form
   74,472.57/111,788.43 = 30,128.31/x
3. Step 3: Cross multiply
   74,472.57x = 111,788.43 × 30,128.31
4. Step 4: Simplify right side
   74,472.57x = 3,367,996,473.45
5. Step 5: Solve for x
   x = 3,367,996,473.45/74,472.57
6. Step 6: Final answer
   x = 45,224.66