Finding the Fourth Proportional to 72,533.18, 108,721.31 and 30,436.13

Step by Step Solution

1. Step 1: Write the proportion equation
   72,533.18 : 108,721.31 = 30,436.13 : x
2. Step 2: Convert to fraction form
   72,533.18/108,721.31 = 30,436.13/x
3. Step 3: Cross multiply
   72,533.18x = 108,721.31 × 30,436.13
4. Step 4: Simplify right side
   72,533.18x = 3,309,056,044.55
5. Step 5: Solve for x
   x = 3,309,056,044.55/72,533.18
6. Step 6: Final answer
   x = 45,621.27