Finding the Fourth Proportional to 71,910.72, 107,856 and 30,348

Step by Step Solution

1. Step 1: Write the proportion equation
   71,910.72 : 107,856 = 30,348 : x
2. Step 2: Convert to fraction form
   71,910.72/107,856 = 30,348/x
3. Step 3: Cross multiply
   71,910.72x = 107,856 × 30,348
4. Step 4: Simplify right side
   71,910.72x = 3,273,213,888
5. Step 5: Solve for x
   x = 3,273,213,888/71,910.72
6. Step 6: Final answer
   x = 45,517.75