Finding the Fourth Proportional to 47,915.92, 66,101.56 and 30,915.76

Step by Step Solution

1. Step 1: Write the proportion equation
   47,915.92 : 66,101.56 = 30,915.76 : x
2. Step 2: Convert to fraction form
   47,915.92/66,101.56 = 30,915.76/x
3. Step 3: Cross multiply
   47,915.92x = 66,101.56 × 30,915.76
4. Step 4: Simplify right side
   47,915.92x = 2,043,579,964.59
5. Step 5: Solve for x
   x = 2,043,579,964.59/47,915.92
6. Step 6: Final answer
   x = 42,649.29