Finding the Fourth Proportional to 55,185.78, 82,320.50 and 53,340.80

Step by Step Solution

1. Step 1: Write the proportion equation
   55,185.78 : 82,320.50 = 53,340.80 : x
2. Step 2: Convert to fraction form
   55,185.78/82,320.50 = 53,340.80/x
3. Step 3: Cross multiply
   55,185.78x = 82,320.50 × 53,340.80
4. Step 4: Simplify right side
   55,185.78x = 4,391,041,326.40
5. Step 5: Solve for x
   x = 4,391,041,326.40/55,185.78
6. Step 6: Final answer
   x = 79,568.35