Finding the Fourth Proportional to 139,311.93, 208,913.38 and 49,319.89

Step by Step Solution

1. Step 1: Write the proportion equation
   139,311.93 : 208,913.38 = 49,319.89 : x
2. Step 2: Convert to fraction form
   139,311.93/208,913.38 = 49,319.89/x
3. Step 3: Cross multiply
   139,311.93x = 208,913.38 × 49,319.89
4. Step 4: Simplify right side
   139,311.93x = 10,303,584,275.55
5. Step 5: Solve for x
   x = 10,303,584,275.55/139,311.93
6. Step 6: Final answer
   x = 73,960.53