Finding the Fourth Proportional to 139,432.66, 209,056.53 and 50,675.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,432.66 : 209,056.53 = 50,675.62 : x
2. Step 2: Convert to fraction form
   139,432.66/209,056.53 = 50,675.62/x
3. Step 3: Cross multiply
   139,432.66x = 209,056.53 × 50,675.62
4. Step 4: Simplify right side
   139,432.66x = 10,594,069,272.80
5. Step 5: Solve for x
   x = 10,594,069,272.80/139,432.66
6. Step 6: Final answer
   x = 75,979.83