Finding the Fourth Proportional to 22,807.60, 31,474.64 and 12,736.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,807.60 : 31,474.64 = 12,736.16 : x
2. Step 2: Convert to fraction form
   22,807.60/31,474.64 = 12,736.16/x
3. Step 3: Cross multiply
   22,807.60x = 31,474.64 × 12,736.16
4. Step 4: Simplify right side
   22,807.60x = 400,865,995.72
5. Step 5: Solve for x
   x = 400,865,995.72/22,807.60
6. Step 6: Final answer
   x = 17,575.99