Finding the Fourth Proportional to 129,694.37, 178,978.55 and 72,337.41

Step by Step Solution

1. Step 1: Write the proportion equation
   129,694.37 : 178,978.55 = 72,337.41 : x
2. Step 2: Convert to fraction form
   129,694.37/178,978.55 = 72,337.41/x
3. Step 3: Cross multiply
   129,694.37x = 178,978.55 × 72,337.41
4. Step 4: Simplify right side
   129,694.37x = 12,946,844,752.56
5. Step 5: Solve for x
   x = 12,946,844,752.56/129,694.37
6. Step 6: Final answer
   x = 99,825.80