Finding the Fourth Proportional to 144,085.55, 216,138.69 and 55,339.04

Step by Step Solution

1. Step 1: Write the proportion equation
   144,085.55 : 216,138.69 = 55,339.04 : x
2. Step 2: Convert to fraction form
   144,085.55/216,138.69 = 55,339.04/x
3. Step 3: Cross multiply
   144,085.55x = 216,138.69 × 55,339.04
4. Step 4: Simplify right side
   144,085.55x = 11,960,908,151.80
5. Step 5: Solve for x
   x = 11,960,908,151.80/144,085.55
6. Step 6: Final answer
   x = 83,012.55