Finding the Fourth Proportional to 138,028.42, 207,086.37 and 49,279.96

Step by Step Solution

1. Step 1: Write the proportion equation
   138,028.42 : 207,086.37 = 49,279.96 : x
2. Step 2: Convert to fraction form
   138,028.42/207,086.37 = 49,279.96/x
3. Step 3: Cross multiply
   138,028.42x = 207,086.37 × 49,279.96
4. Step 4: Simplify right side
   138,028.42x = 10,205,208,030.15
5. Step 5: Solve for x
   x = 10,205,208,030.15/138,028.42
6. Step 6: Final answer
   x = 73,935.56