Finding the Fourth Proportional to 72,017.91, 99,384.57 and 40,184.91

Step by Step Solution

1. Step 1: Write the proportion equation
   72,017.91 : 99,384.57 = 40,184.91 : x
2. Step 2: Convert to fraction form
   72,017.91/99,384.57 = 40,184.91/x
3. Step 3: Cross multiply
   72,017.91x = 99,384.57 × 40,184.91
4. Step 4: Simplify right side
   72,017.91x = 3,993,760,000.84
5. Step 5: Solve for x
   x = 3,993,760,000.84/72,017.91
6. Step 6: Final answer
   x = 55,455.09