Finding the Fourth Proportional to 51,390.72, 77,086.94 and 18,111.19

Step by Step Solution

1. Step 1: Write the proportion equation
   51,390.72 : 77,086.94 = 18,111.19 : x
2. Step 2: Convert to fraction form
   51,390.72/77,086.94 = 18,111.19/x
3. Step 3: Cross multiply
   51,390.72x = 77,086.94 × 18,111.19
4. Step 4: Simplify right side
   51,390.72x = 1,396,136,216.86
5. Step 5: Solve for x
   x = 1,396,136,216.86/51,390.72
6. Step 6: Final answer
   x = 27,167.09