Finding the Fourth Proportional to 146,086.72, 218,993.76 and 79,428.16

Step by Step Solution

1. Step 1: Write the proportion equation
   146,086.72 : 218,993.76 = 79,428.16 : x
2. Step 2: Convert to fraction form
   146,086.72/218,993.76 = 79,428.16/x
3. Step 3: Cross multiply
   146,086.72x = 218,993.76 × 79,428.16
4. Step 4: Simplify right side
   146,086.72x = 17,394,271,408.28
5. Step 5: Solve for x
   x = 17,394,271,408.28/146,086.72
6. Step 6: Final answer
   x = 119,068.12