Finding the Fourth Proportional to 72,199.72, 99,635.34 and 40,368.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72,199.72 : 99,635.34 = 40,368.52 : x
2. Step 2: Convert to fraction form
   72,199.72/99,635.34 = 40,368.52/x
3. Step 3: Cross multiply
   72,199.72x = 99,635.34 × 40,368.52
4. Step 4: Simplify right side
   72,199.72x = 4,022,131,215.50
5. Step 5: Solve for x
   x = 4,022,131,215.50/72,199.72
6. Step 6: Final answer
   x = 55,708.40