Finding the Fourth Proportional to 22,477.90, 31,019.47 and 12,406.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,477.90 : 31,019.47 = 12,406.34 : x
2. Step 2: Convert to fraction form
   22,477.90/31,019.47 = 12,406.34/x
3. Step 3: Cross multiply
   22,477.90x = 31,019.47 × 12,406.34
4. Step 4: Simplify right side
   22,477.90x = 384,838,091.44
5. Step 5: Solve for x
   x = 384,838,091.44/22,477.90
6. Step 6: Final answer
   x = 17,120.73