Finding the Fourth Proportional to 139,209.06, 208,836.21 and 43,123.84

Step by Step Solution

1. Step 1: Write the proportion equation
   139,209.06 : 208,836.21 = 43,123.84 : x
2. Step 2: Convert to fraction form
   139,209.06/208,836.21 = 43,123.84/x
3. Step 3: Cross multiply
   139,209.06x = 208,836.21 × 43,123.84
4. Step 4: Simplify right side
   139,209.06x = 9,005,818,046.45
5. Step 5: Solve for x
   x = 9,005,818,046.45/139,209.06
6. Step 6: Final answer
   x = 64,692.76