Finding the Fourth Proportional to 22,807.51, 31,477.55 and 12,736.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,807.51 : 31,477.55 = 12,736.60 : x
2. Step 2: Convert to fraction form
   22,807.51/31,477.55 = 12,736.60/x
3. Step 3: Cross multiply
   22,807.51x = 31,477.55 × 12,736.60
4. Step 4: Simplify right side
   22,807.51x = 400,916,820.95
5. Step 5: Solve for x
   x = 400,916,820.95/22,807.51
6. Step 6: Final answer
   x = 17,578.28