Finding the Fourth Proportional to 144,086.79, 216,140.57 and 55,340.29

Step by Step Solution

1. Step 1: Write the proportion equation
   144,086.79 : 216,140.57 = 55,340.29 : x
2. Step 2: Convert to fraction form
   144,086.79/216,140.57 = 55,340.29/x
3. Step 3: Cross multiply
   144,086.79x = 216,140.57 × 55,340.29
4. Step 4: Simplify right side
   144,086.79x = 11,961,281,824.57
5. Step 5: Solve for x
   x = 11,961,281,824.57/144,086.79
6. Step 6: Final answer
   x = 83,014.42