Finding the Fourth Proportional to 139,005.98, 206,720.71 and 134,577.30

Step by Step Solution

1. Step 1: Write the proportion equation
   139,005.98 : 206,720.71 = 134,577.30 : x
2. Step 2: Convert to fraction form
   139,005.98/206,720.71 = 134,577.30/x
3. Step 3: Cross multiply
   139,005.98x = 206,720.71 × 134,577.30
4. Step 4: Simplify right side
   139,005.98x = 27,819,915,005.88
5. Step 5: Solve for x
   x = 27,819,915,005.88/139,005.98
6. Step 6: Final answer
   x = 200,134.66