Finding the Fourth Proportional to 139,566.34, 209,418.77 and 55,324.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,566.34 : 209,418.77 = 55,324.72 : x
2. Step 2: Convert to fraction form
   139,566.34/209,418.77 = 55,324.72/x
3. Step 3: Cross multiply
   139,566.34x = 209,418.77 × 55,324.72
4. Step 4: Simplify right side
   139,566.34x = 11,586,034,812.99
5. Step 5: Solve for x
   x = 11,586,034,812.99/139,566.34
6. Step 6: Final answer
   x = 83,014.53