Finding the Fourth Proportional to 139,147.38, 208,751.31 and 45,649.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,147.38 : 208,751.31 = 45,649.62 : x
2. Step 2: Convert to fraction form
   139,147.38/208,751.31 = 45,649.62/x
3. Step 3: Cross multiply
   139,147.38x = 208,751.31 × 45,649.62
4. Step 4: Simplify right side
   139,147.38x = 9,529,417,976.00
5. Step 5: Solve for x
   x = 9,529,417,976.00/139,147.38
6. Step 6: Final answer
   x = 68,484.35