Finding the Fourth Proportional to 71,919.55, 107,916.30 and 55,160.22

Step by Step Solution

1. Step 1: Write the proportion equation
   71,919.55 : 107,916.30 = 55,160.22 : x
2. Step 2: Convert to fraction form
   71,919.55/107,916.30 = 55,160.22/x
3. Step 3: Cross multiply
   71,919.55x = 107,916.30 × 55,160.22
4. Step 4: Simplify right side
   71,919.55x = 5,952,686,849.59
5. Step 5: Solve for x
   x = 5,952,686,849.59/71,919.55
6. Step 6: Final answer
   x = 82,768.69