Finding the Fourth Proportional to 139,432.16, 209,055.78 and 50,675.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,432.16 : 209,055.78 = 50,675.12 : x
2. Step 2: Convert to fraction form
   139,432.16/209,055.78 = 50,675.12/x
3. Step 3: Cross multiply
   139,432.16x = 209,055.78 × 50,675.12
4. Step 4: Simplify right side
   139,432.16x = 10,593,926,738.19
5. Step 5: Solve for x
   x = 10,593,926,738.19/139,432.16
6. Step 6: Final answer
   x = 75,979.08