Finding the Fourth Proportional to 40,812.76, 61,196.82 and 12,725.30

Step by Step Solution

1. Step 1: Write the proportion equation
   40,812.76 : 61,196.82 = 12,725.30 : x
2. Step 2: Convert to fraction form
   40,812.76/61,196.82 = 12,725.30/x
3. Step 3: Cross multiply
   40,812.76x = 61,196.82 × 12,725.30
4. Step 4: Simplify right side
   40,812.76x = 778,747,998.82
5. Step 5: Solve for x
   x = 778,747,998.82/40,812.76
6. Step 6: Final answer
   x = 19,080.99