Finding the Fourth Proportional to 35,139.72, 52,730.37 and 12,968.54

Step by Step Solution

1. Step 1: Write the proportion equation
   35,139.72 : 52,730.37 = 12,968.54 : x
2. Step 2: Convert to fraction form
   35,139.72/52,730.37 = 12,968.54/x
3. Step 3: Cross multiply
   35,139.72x = 52,730.37 × 12,968.54
4. Step 4: Simplify right side
   35,139.72x = 683,835,648.91
5. Step 5: Solve for x
   x = 683,835,648.91/35,139.72
6. Step 6: Final answer
   x = 19,460.48