Finding the Fourth Proportional to 144,559.20, 216,876.60 and 55,815.60

Step by Step Solution

1. Step 1: Write the proportion equation
   144,559.20 : 216,876.60 = 55,815.60 : x
2. Step 2: Convert to fraction form
   144,559.20/216,876.60 = 55,815.60/x
3. Step 3: Cross multiply
   144,559.20x = 216,876.60 × 55,815.60
4. Step 4: Simplify right side
   144,559.20x = 12,105,097,554.96
5. Step 5: Solve for x
   x = 12,105,097,554.96/144,559.20
6. Step 6: Final answer
   x = 83,737.99