Finding the Fourth Proportional to 105,131.46, 145,082.01 and 57,383.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105,131.46 : 145,082.01 = 57,383.76 : x
2. Step 2: Convert to fraction form
   105,131.46/145,082.01 = 57,383.76/x
3. Step 3: Cross multiply
   105,131.46x = 145,082.01 × 57,383.76
4. Step 4: Simplify right side
   105,131.46x = 8,325,351,242.16
5. Step 5: Solve for x
   x = 8,325,351,242.16/105,131.46
6. Step 6: Final answer
   x = 79,189.91