Finding the Fourth Proportional to 139,569.34, 209,423.26 and 55,327.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,569.34 : 209,423.26 = 55,327.72 : x
2. Step 2: Convert to fraction form
   139,569.34/209,423.26 = 55,327.72/x
3. Step 3: Cross multiply
   139,569.34x = 209,423.26 × 55,327.72
4. Step 4: Simplify right side
   139,569.34x = 11,586,911,490.77
5. Step 5: Solve for x
   x = 11,586,911,490.77/139,569.34
6. Step 6: Final answer
   x = 83,019.03