Finding the Fourth Proportional to 40,437.48, 60,662.82 and 12,729

Step by Step Solution

1. Step 1: Write the proportion equation
   40,437.48 : 60,662.82 = 12,729 : x
2. Step 2: Convert to fraction form
   40,437.48/60,662.82 = 12,729/x
3. Step 3: Cross multiply
   40,437.48x = 60,662.82 × 12,729
4. Step 4: Simplify right side
   40,437.48x = 772,177,035.78
5. Step 5: Solve for x
   x = 772,177,035.78/40,437.48
6. Step 6: Final answer
   x = 19,095.58