Finding the Fourth Proportional to 139,291.65, 209,020.48 and 50,552.07

Step by Step Solution

1. Step 1: Write the proportion equation
   139,291.65 : 209,020.48 = 50,552.07 : x
2. Step 2: Convert to fraction form
   139,291.65/209,020.48 = 50,552.07/x
3. Step 3: Cross multiply
   139,291.65x = 209,020.48 × 50,552.07
4. Step 4: Simplify right side
   139,291.65x = 10,566,417,683.63
5. Step 5: Solve for x
   x = 10,566,417,683.63/139,291.65
6. Step 6: Final answer
   x = 75,858.23