Finding the Fourth Proportional to 72,196.99, 99,632.50 and 40,365.95

Step by Step Solution

1. Step 1: Write the proportion equation
   72,196.99 : 99,632.50 = 40,365.95 : x
2. Step 2: Convert to fraction form
   72,196.99/99,632.50 = 40,365.95/x
3. Step 3: Cross multiply
   72,196.99x = 99,632.50 × 40,365.95
4. Step 4: Simplify right side
   72,196.99x = 4,021,759,914.30
5. Step 5: Solve for x
   x = 4,021,759,914.30/72,196.99
6. Step 6: Final answer
   x = 55,705.37