Finding the Fourth Proportional to 71,916.94, 99,243.96 and 40,083.94

Step by Step Solution

1. Step 1: Write the proportion equation
   71,916.94 : 99,243.96 = 40,083.94 : x
2. Step 2: Convert to fraction form
   71,916.94/99,243.96 = 40,083.94/x
3. Step 3: Cross multiply
   71,916.94x = 99,243.96 × 40,083.94
4. Step 4: Simplify right side
   71,916.94x = 3,978,088,938.00
5. Step 5: Solve for x
   x = 3,978,088,938.00/71,916.94
6. Step 6: Final answer
   x = 55,315.05