Finding the Fourth Proportional to 72,227.31, 99,674.01 and 40,396.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,227.31 : 99,674.01 = 40,396.20 : x
2. Step 2: Convert to fraction form
   72,227.31/99,674.01 = 40,396.20/x
3. Step 3: Cross multiply
   72,227.31x = 99,674.01 × 40,396.20
4. Step 4: Simplify right side
   72,227.31x = 4,026,451,242.76
5. Step 5: Solve for x
   x = 4,026,451,242.76/72,227.31
6. Step 6: Final answer
   x = 55,746.94