Finding the Fourth Proportional to 139,609.71, 209,290.05 and 50,801.13

Step by Step Solution

1. Step 1: Write the proportion equation
   139,609.71 : 209,290.05 = 50,801.13 : x
2. Step 2: Convert to fraction form
   139,609.71/209,290.05 = 50,801.13/x
3. Step 3: Cross multiply
   139,609.71x = 209,290.05 × 50,801.13
4. Step 4: Simplify right side
   139,609.71x = 10,632,171,037.76
5. Step 5: Solve for x
   x = 10,632,171,037.76/139,609.71
6. Step 6: Final answer
   x = 76,156.39