Finding the Fourth Proportional to 139,261.77, 208,961.70 and 55,082.34

Step by Step Solution

1. Step 1: Write the proportion equation
   139,261.77 : 208,961.70 = 55,082.34 : x
2. Step 2: Convert to fraction form
   139,261.77/208,961.70 = 55,082.34/x
3. Step 3: Cross multiply
   139,261.77x = 208,961.70 × 55,082.34
4. Step 4: Simplify right side
   139,261.77x = 11,510,099,406.38
5. Step 5: Solve for x
   x = 11,510,099,406.38/139,261.77
6. Step 6: Final answer
   x = 82,650.82