Finding the Fourth Proportional to 22,913.67, 31,620.63 and 12,842.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,913.67 : 31,620.63 = 12,842.55 : x
2. Step 2: Convert to fraction form
   22,913.67/31,620.63 = 12,842.55/x
3. Step 3: Cross multiply
   22,913.67x = 31,620.63 × 12,842.55
4. Step 4: Simplify right side
   22,913.67x = 406,089,521.81
5. Step 5: Solve for x
   x = 406,089,521.81/22,913.67
6. Step 6: Final answer
   x = 17,722.59