Finding the Fourth Proportional to 40,493.24, 60,742.74 and 12,791

Step by Step Solution

1. Step 1: Write the proportion equation
   40,493.24 : 60,742.74 = 12,791 : x
2. Step 2: Convert to fraction form
   40,493.24/60,742.74 = 12,791/x
3. Step 3: Cross multiply
   40,493.24x = 60,742.74 × 12,791
4. Step 4: Simplify right side
   40,493.24x = 776,960,387.34
5. Step 5: Solve for x
   x = 776,960,387.34/40,493.24
6. Step 6: Final answer
   x = 19,187.41