Finding the Fourth Proportional to 73,980.72, 102,096 and 42,154.56

Step by Step Solution

1. Step 1: Write the proportion equation
   73,980.72 : 102,096 = 42,154.56 : x
2. Step 2: Convert to fraction form
   73,980.72/102,096 = 42,154.56/x
3. Step 3: Cross multiply
   73,980.72x = 102,096 × 42,154.56
4. Step 4: Simplify right side
   73,980.72x = 4,303,811,957.76
5. Step 5: Solve for x
   x = 4,303,811,957.76/73,980.72
6. Step 6: Final answer
   x = 58,174.78