Finding the Fourth Proportional to 139,441.56, 209,209.68 and 50,702.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,441.56 : 209,209.68 = 50,702.16 : x
2. Step 2: Convert to fraction form
   139,441.56/209,209.68 = 50,702.16/x
3. Step 3: Cross multiply
   139,441.56x = 209,209.68 × 50,702.16
4. Step 4: Simplify right side
   139,441.56x = 10,607,382,668.91
5. Step 5: Solve for x
   x = 10,607,382,668.91/139,441.56
6. Step 6: Final answer
   x = 76,070.45