Finding the Fourth Proportional to 144,085.42, 216,138.50 and 55,338.92

Step by Step Solution

1. Step 1: Write the proportion equation
   144,085.42 : 216,138.50 = 55,338.92 : x
2. Step 2: Convert to fraction form
   144,085.42/216,138.50 = 55,338.92/x
3. Step 3: Cross multiply
   144,085.42x = 216,138.50 × 55,338.92
4. Step 4: Simplify right side
   144,085.42x = 11,960,871,160.42
5. Step 5: Solve for x
   x = 11,960,871,160.42/144,085.42
6. Step 6: Final answer
   x = 83,012.36