Finding the Fourth Proportional to 72,310.01, 99,786.71 and 40,480.05

Step by Step Solution

1. Step 1: Write the proportion equation
   72,310.01 : 99,786.71 = 40,480.05 : x
2. Step 2: Convert to fraction form
   72,310.01/99,786.71 = 40,480.05/x
3. Step 3: Cross multiply
   72,310.01x = 99,786.71 × 40,480.05
4. Step 4: Simplify right side
   72,310.01x = 4,039,371,111.34
5. Step 5: Solve for x
   x = 4,039,371,111.34/72,310.01
6. Step 6: Final answer
   x = 55,861.85