Finding the Fourth Proportional to 144,774.54, 216,171.59 and 129,684.24

Step by Step Solution

1. Step 1: Write the proportion equation
   144,774.54 : 216,171.59 = 129,684.24 : x
2. Step 2: Convert to fraction form
   144,774.54/216,171.59 = 129,684.24/x
3. Step 3: Cross multiply
   144,774.54x = 216,171.59 × 129,684.24
4. Step 4: Simplify right side
   144,774.54x = 28,034,047,710.32
5. Step 5: Solve for x
   x = 28,034,047,710.32/144,774.54
6. Step 6: Final answer
   x = 193,639.35