Finding the Fourth Proportional to 139,025.72, 208,538.58 and 50,258.46

Step by Step Solution

1. Step 1: Write the proportion equation
   139,025.72 : 208,538.58 = 50,258.46 : x
2. Step 2: Convert to fraction form
   139,025.72/208,538.58 = 50,258.46/x
3. Step 3: Cross multiply
   139,025.72x = 208,538.58 × 50,258.46
4. Step 4: Simplify right side
   139,025.72x = 10,480,827,881.39
5. Step 5: Solve for x
   x = 10,480,827,881.39/139,025.72
6. Step 6: Final answer
   x = 75,387.69