Finding the Fourth Proportional to 139,245.20, 208,878.83 and 39,406.01

Step by Step Solution

1. Step 1: Write the proportion equation
   139,245.20 : 208,878.83 = 39,406.01 : x
2. Step 2: Convert to fraction form
   139,245.20/208,878.83 = 39,406.01/x
3. Step 3: Cross multiply
   139,245.20x = 208,878.83 × 39,406.01
4. Step 4: Simplify right side
   139,245.20x = 8,231,080,022.34
5. Step 5: Solve for x
   x = 8,231,080,022.34/139,245.20
6. Step 6: Final answer
   x = 59,112.13