Finding the Fourth Proportional to 53,388.56, 73,671.31 and 30,721.52

Step by Step Solution

1. Step 1: Write the proportion equation
   53,388.56 : 73,671.31 = 30,721.52 : x
2. Step 2: Convert to fraction form
   53,388.56/73,671.31 = 30,721.52/x
3. Step 3: Cross multiply
   53,388.56x = 73,671.31 × 30,721.52
4. Step 4: Simplify right side
   53,388.56x = 2,263,294,623.59
5. Step 5: Solve for x
   x = 2,263,294,623.59/53,388.56
6. Step 6: Final answer
   x = 42,392.88