Finding the Fourth Proportional to 72,056.67, 99,434.07 and 40,227.57

Step by Step Solution

1. Step 1: Write the proportion equation
   72,056.67 : 99,434.07 = 40,227.57 : x
2. Step 2: Convert to fraction form
   72,056.67/99,434.07 = 40,227.57/x
3. Step 3: Cross multiply
   72,056.67x = 99,434.07 × 40,227.57
4. Step 4: Simplify right side
   72,056.67x = 3,999,991,011.31
5. Step 5: Solve for x
   x = 3,999,991,011.31/72,056.67
6. Step 6: Final answer
   x = 55,511.74