Finding the Fourth Proportional to 47,019.87, 64,905.48 and 31,919.28

Step by Step Solution

1. Step 1: Write the proportion equation
   47,019.87 : 64,905.48 = 31,919.28 : x
2. Step 2: Convert to fraction form
   47,019.87/64,905.48 = 31,919.28/x
3. Step 3: Cross multiply
   47,019.87x = 64,905.48 × 31,919.28
4. Step 4: Simplify right side
   47,019.87x = 2,071,736,189.65
5. Step 5: Solve for x
   x = 2,071,736,189.65/47,019.87
6. Step 6: Final answer
   x = 44,060.87