Finding the Fourth Proportional to 139,534.81, 209,179.33 and 55,354.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,534.81 : 209,179.33 = 55,354.10 : x
2. Step 2: Convert to fraction form
   139,534.81/209,179.33 = 55,354.10/x
3. Step 3: Cross multiply
   139,534.81x = 209,179.33 × 55,354.10
4. Step 4: Simplify right side
   139,534.81x = 11,578,932,366.47
5. Step 5: Solve for x
   x = 11,578,932,366.47/139,534.81
6. Step 6: Final answer
   x = 82,982.39