Finding the Fourth Proportional to 72,429.66, 108,686.88 and 30,306.21

Step by Step Solution

1. Step 1: Write the proportion equation
   72,429.66 : 108,686.88 = 30,306.21 : x
2. Step 2: Convert to fraction form
   72,429.66/108,686.88 = 30,306.21/x
3. Step 3: Cross multiply
   72,429.66x = 108,686.88 × 30,306.21
4. Step 4: Simplify right side
   72,429.66x = 3,293,887,409.52
5. Step 5: Solve for x
   x = 3,293,887,409.52/72,429.66
6. Step 6: Final answer
   x = 45,477.05