Finding the Fourth Proportional to 139,068.05, 208,509.89 and 50,310

Step by Step Solution

1. Step 1: Write the proportion equation
   139,068.05 : 208,509.89 = 50,310 : x
2. Step 2: Convert to fraction form
   139,068.05/208,509.89 = 50,310/x
3. Step 3: Cross multiply
   139,068.05x = 208,509.89 × 50,310
4. Step 4: Simplify right side
   139,068.05x = 10,490,132,314.35
5. Step 5: Solve for x
   x = 10,490,132,314.35/139,068.05
6. Step 6: Final answer
   x = 75,431.65