Finding the Fourth Proportional to 40,730.91, 61,105.91 and 12,649.53

Step by Step Solution

1. Step 1: Write the proportion equation
   40,730.91 : 61,105.91 = 12,649.53 : x
2. Step 2: Convert to fraction form
   40,730.91/61,105.91 = 12,649.53/x
3. Step 3: Cross multiply
   40,730.91x = 61,105.91 × 12,649.53
4. Step 4: Simplify right side
   40,730.91x = 772,960,978.47
5. Step 5: Solve for x
   x = 772,960,978.47/40,730.91
6. Step 6: Final answer
   x = 18,977.26