Finding the Fourth Proportional to 72,086.81, 99,482.60 and 39,823.09

Step by Step Solution

1. Step 1: Write the proportion equation
   72,086.81 : 99,482.60 = 39,823.09 : x
2. Step 2: Convert to fraction form
   72,086.81/99,482.60 = 39,823.09/x
3. Step 3: Cross multiply
   72,086.81x = 99,482.60 × 39,823.09
4. Step 4: Simplify right side
   72,086.81x = 3,961,704,384.09
5. Step 5: Solve for x
   x = 3,961,704,384.09/72,086.81
6. Step 6: Final answer
   x = 54,957.41