Finding the Fourth Proportional to 143,234.98, 214,642.17 and 72,059.78

Step by Step Solution

1. Step 1: Write the proportion equation
   143,234.98 : 214,642.17 = 72,059.78 : x
2. Step 2: Convert to fraction form
   143,234.98/214,642.17 = 72,059.78/x
3. Step 3: Cross multiply
   143,234.98x = 214,642.17 × 72,059.78
4. Step 4: Simplify right side
   143,234.98x = 15,467,068,085.53
5. Step 5: Solve for x
   x = 15,467,068,085.53/143,234.98
6. Step 6: Final answer
   x = 107,983.88