Finding the Fourth Proportional to 72,338.21, 99,823.98 and 40,505.51

Step by Step Solution

1. Step 1: Write the proportion equation
   72,338.21 : 99,823.98 = 40,505.51 : x
2. Step 2: Convert to fraction form
   72,338.21/99,823.98 = 40,505.51/x
3. Step 3: Cross multiply
   72,338.21x = 99,823.98 × 40,505.51
4. Step 4: Simplify right side
   72,338.21x = 4,043,421,017.60
5. Step 5: Solve for x
   x = 4,043,421,017.60/72,338.21
6. Step 6: Final answer
   x = 55,896.06