Finding the Fourth Proportional to 74,627.72, 111,945.42 and 21,315.49

Step by Step Solution

1. Step 1: Write the proportion equation
   74,627.72 : 111,945.42 = 21,315.49 : x
2. Step 2: Convert to fraction form
   74,627.72/111,945.42 = 21,315.49/x
3. Step 3: Cross multiply
   74,627.72x = 111,945.42 × 21,315.49
4. Step 4: Simplify right side
   74,627.72x = 2,386,171,910.32
5. Step 5: Solve for x
   x = 2,386,171,910.32/74,627.72
6. Step 6: Final answer
   x = 31,974.34