Finding the Fourth Proportional to 31,809.72, 47,662.62 and 19,333.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,809.72 : 47,662.62 = 19,333.56 : x
2. Step 2: Convert to fraction form
   31,809.72/47,662.62 = 19,333.56/x
3. Step 3: Cross multiply
   31,809.72x = 47,662.62 × 19,333.56
4. Step 4: Simplify right side
   31,809.72x = 921,488,123.53
5. Step 5: Solve for x
   x = 921,488,123.53/31,809.72
6. Step 6: Final answer
   x = 28,968.76