Finding the Fourth Proportional to 22,477.77, 31,019.27 and 12,406.23

Step by Step Solution

1. Step 1: Write the proportion equation
   22,477.77 : 31,019.27 = 12,406.23 : x
2. Step 2: Convert to fraction form
   22,477.77/31,019.27 = 12,406.23/x
3. Step 3: Cross multiply
   22,477.77x = 31,019.27 × 12,406.23
4. Step 4: Simplify right side
   22,477.77x = 384,832,136.02
5. Step 5: Solve for x
   x = 384,832,136.02/22,477.77
6. Step 6: Final answer
   x = 17,120.57