Finding the Fourth Proportional to 40,142.93, 55,284.88 and 39,271.20

Step by Step Solution

1. Step 1: Write the proportion equation
   40,142.93 : 55,284.88 = 39,271.20 : x
2. Step 2: Convert to fraction form
   40,142.93/55,284.88 = 39,271.20/x
3. Step 3: Cross multiply
   40,142.93x = 55,284.88 × 39,271.20
4. Step 4: Simplify right side
   40,142.93x = 2,171,103,347.59
5. Step 5: Solve for x
   x = 2,171,103,347.59/40,142.93
6. Step 6: Final answer
   x = 54,084.33