Finding the Fourth Proportional to 72,753.48, 109,049.28 and 30,621.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,753.48 : 109,049.28 = 30,621.12 : x
2. Step 2: Convert to fraction form
   72,753.48/109,049.28 = 30,621.12/x
3. Step 3: Cross multiply
   72,753.48x = 109,049.28 × 30,621.12
4. Step 4: Simplify right side
   72,753.48x = 3,339,211,088.79
5. Step 5: Solve for x
   x = 3,339,211,088.79/72,753.48
6. Step 6: Final answer
   x = 45,897.61