Finding the Fourth Proportional to 139,417.76, 209,126.64 and 50,654.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,417.76 : 209,126.64 = 50,654.72 : x
2. Step 2: Convert to fraction form
   139,417.76/209,126.64 = 50,654.72/x
3. Step 3: Cross multiply
   139,417.76x = 209,126.64 × 50,654.72
4. Step 4: Simplify right side
   139,417.76x = 10,593,251,393.74
5. Step 5: Solve for x
   x = 10,593,251,393.74/139,417.76
6. Step 6: Final answer
   x = 75,982.08