Finding the Fourth Proportional to 22,810.51, 31,477.61 and 12,738.77

Step by Step Solution

1. Step 1: Write the proportion equation
   22,810.51 : 31,477.61 = 12,738.77 : x
2. Step 2: Convert to fraction form
   22,810.51/31,477.61 = 12,738.77/x
3. Step 3: Cross multiply
   22,810.51x = 31,477.61 × 12,738.77
4. Step 4: Simplify right side
   22,810.51x = 400,986,026.44
5. Step 5: Solve for x
   x = 400,986,026.44/22,810.51
6. Step 6: Final answer
   x = 17,579.00