Finding the Fourth Proportional to 139,156.25, 208,733.84 and 50,388.99

Step by Step Solution

1. Step 1: Write the proportion equation
   139,156.25 : 208,733.84 = 50,388.99 : x
2. Step 2: Convert to fraction form
   139,156.25/208,733.84 = 50,388.99/x
3. Step 3: Cross multiply
   139,156.25x = 208,733.84 × 50,388.99
4. Step 4: Simplify right side
   139,156.25x = 10,517,886,530.68
5. Step 5: Solve for x
   x = 10,517,886,530.68/139,156.25
6. Step 6: Final answer
   x = 75,583.29