Finding the Fourth Proportional to 47,049.40, 64,931.58 and 31,106.20

Step by Step Solution

1. Step 1: Write the proportion equation
   47,049.40 : 64,931.58 = 31,106.20 : x
2. Step 2: Convert to fraction form
   47,049.40/64,931.58 = 31,106.20/x
3. Step 3: Cross multiply
   47,049.40x = 64,931.58 × 31,106.20
4. Step 4: Simplify right side
   47,049.40x = 2,019,774,713.80
5. Step 5: Solve for x
   x = 2,019,774,713.80/47,049.40
6. Step 6: Final answer
   x = 42,928.81