Finding the Fourth Proportional to 22,848.47, 31,517.74 and 13,415.21

Step by Step Solution

1. Step 1: Write the proportion equation
   22,848.47 : 31,517.74 = 13,415.21 : x
2. Step 2: Convert to fraction form
   22,848.47/31,517.74 = 13,415.21/x
3. Step 3: Cross multiply
   22,848.47x = 31,517.74 × 13,415.21
4. Step 4: Simplify right side
   22,848.47x = 422,817,100.83
5. Step 5: Solve for x
   x = 422,817,100.83/22,848.47
6. Step 6: Final answer
   x = 18,505.27