Finding the Fourth Proportional to 22,493.94, 31,045.72 and 13,419.90

Step by Step Solution

1. Step 1: Write the proportion equation
   22,493.94 : 31,045.72 = 13,419.90 : x
2. Step 2: Convert to fraction form
   22,493.94/31,045.72 = 13,419.90/x
3. Step 3: Cross multiply
   22,493.94x = 31,045.72 × 13,419.90
4. Step 4: Simplify right side
   22,493.94x = 416,630,457.83
5. Step 5: Solve for x
   x = 416,630,457.83/22,493.94
6. Step 6: Final answer
   x = 18,521.90