Finding the Fourth Proportional to 111,578.76, 167,386.56 and 55,420.72

Step by Step Solution

1. Step 1: Write the proportion equation
   111,578.76 : 167,386.56 = 55,420.72 : x
2. Step 2: Convert to fraction form
   111,578.76/167,386.56 = 55,420.72/x
3. Step 3: Cross multiply
   111,578.76x = 167,386.56 × 55,420.72
4. Step 4: Simplify right side
   111,578.76x = 9,276,683,673.52
5. Step 5: Solve for x
   x = 9,276,683,673.52/111,578.76
6. Step 6: Final answer
   x = 83,140.23