Finding the Fourth Proportional to 22,493.06, 31,039.80 and 12,421.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,493.06 : 31,039.80 = 12,421.31 : x
2. Step 2: Convert to fraction form
   22,493.06/31,039.80 = 12,421.31/x
3. Step 3: Cross multiply
   22,493.06x = 31,039.80 × 12,421.31
4. Step 4: Simplify right side
   22,493.06x = 385,554,978.14
5. Step 5: Solve for x
   x = 385,554,978.14/22,493.06
6. Step 6: Final answer
   x = 17,141.06