Finding the Fourth Proportional to 47,078.28, 64,971.54 and 30,956.04

Step by Step Solution

1. Step 1: Write the proportion equation
   47,078.28 : 64,971.54 = 30,956.04 : x
2. Step 2: Convert to fraction form
   47,078.28/64,971.54 = 30,956.04/x
3. Step 3: Cross multiply
   47,078.28x = 64,971.54 × 30,956.04
4. Step 4: Simplify right side
   47,078.28x = 2,011,261,591.10
5. Step 5: Solve for x
   x = 2,011,261,591.10/47,078.28
6. Step 6: Final answer
   x = 42,721.65