Finding the Fourth Proportional to 61,419.92, 91,945.34 and 55,003.80

Step by Step Solution

1. Step 1: Write the proportion equation
   61,419.92 : 91,945.34 = 55,003.80 : x
2. Step 2: Convert to fraction form
   61,419.92/91,945.34 = 55,003.80/x
3. Step 3: Cross multiply
   61,419.92x = 91,945.34 × 55,003.80
4. Step 4: Simplify right side
   61,419.92x = 5,057,342,817.27
5. Step 5: Solve for x
   x = 5,057,342,817.27/61,419.92
6. Step 6: Final answer
   x = 82,340.44