Finding the Fourth Proportional to 31,519.72, 47,322.78 and 19,798.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,519.72 : 47,322.78 = 19,798.12 : x
2. Step 2: Convert to fraction form
   31,519.72/47,322.78 = 19,798.12/x
3. Step 3: Cross multiply
   31,519.72x = 47,322.78 × 19,798.12
4. Step 4: Simplify right side
   31,519.72x = 936,902,077.17
5. Step 5: Solve for x
   x = 936,902,077.17/31,519.72
6. Step 6: Final answer
   x = 29,724.31