Finding the Fourth Proportional to 139,040.80, 208,559.04 and 33,858.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,040.80 : 208,559.04 = 33,858.88 : x
2. Step 2: Convert to fraction form
   139,040.80/208,559.04 = 33,858.88/x
3. Step 3: Cross multiply
   139,040.80x = 208,559.04 × 33,858.88
4. Step 4: Simplify right side
   139,040.80x = 7,061,575,508.28
5. Step 5: Solve for x
   x = 7,061,575,508.28/139,040.80
6. Step 6: Final answer
   x = 50,787.79