Finding the Fourth Proportional to 363,796.41, 545,561.46 and 139,045.71

Step by Step Solution

1. Step 1: Write the proportion equation
   363,796.41 : 545,561.46 = 139,045.71 : x
2. Step 2: Convert to fraction form
   363,796.41/545,561.46 = 139,045.71/x
3. Step 3: Cross multiply
   363,796.41x = 545,561.46 × 139,045.71
4. Step 4: Simplify right side
   363,796.41x = 75,857,980,554.34
5. Step 5: Solve for x
   x = 75,857,980,554.34/363,796.41
6. Step 6: Final answer
   x = 208,517.67