Finding the Fourth Proportional to 139,060.74, 208,498.95 and 50,302.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,060.74 : 208,498.95 = 50,302.56 : x
2. Step 2: Convert to fraction form
   139,060.74/208,498.95 = 50,302.56/x
3. Step 3: Cross multiply
   139,060.74x = 208,498.95 × 50,302.56
4. Step 4: Simplify right side
   139,060.74x = 10,488,030,942.31
5. Step 5: Solve for x
   x = 10,488,030,942.31/139,060.74
6. Step 6: Final answer
   x = 75,420.50