Finding the Fourth Proportional to 72,184.05, 99,612.33 and 40,355.91

Step by Step Solution

1. Step 1: Write the proportion equation
   72,184.05 : 99,612.33 = 40,355.91 : x
2. Step 2: Convert to fraction form
   72,184.05/99,612.33 = 40,355.91/x
3. Step 3: Cross multiply
   72,184.05x = 99,612.33 × 40,355.91
4. Step 4: Simplify right side
   72,184.05x = 4,019,946,224.37
5. Step 5: Solve for x
   x = 4,019,946,224.37/72,184.05
6. Step 6: Final answer
   x = 55,690.23