Finding the Fourth Proportional to 129,096.56, 178,169.96 and 72,507.94

Step by Step Solution

1. Step 1: Write the proportion equation
   129,096.56 : 178,169.96 = 72,507.94 : x
2. Step 2: Convert to fraction form
   129,096.56/178,169.96 = 72,507.94/x
3. Step 3: Cross multiply
   129,096.56x = 178,169.96 × 72,507.94
4. Step 4: Simplify right side
   129,096.56x = 12,918,736,505.33
5. Step 5: Solve for x
   x = 12,918,736,505.33/129,096.56
6. Step 6: Final answer
   x = 100,070.34