Finding the Fourth Proportional to 72,990.59, 109,529.11 and 30,868.36

Step by Step Solution

1. Step 1: Write the proportion equation
   72,990.59 : 109,529.11 = 30,868.36 : x
2. Step 2: Convert to fraction form
   72,990.59/109,529.11 = 30,868.36/x
3. Step 3: Cross multiply
   72,990.59x = 109,529.11 × 30,868.36
4. Step 4: Simplify right side
   72,990.59x = 3,380,983,762.72
5. Step 5: Solve for x
   x = 3,380,983,762.72/72,990.59
6. Step 6: Final answer
   x = 46,320.82