Finding the Fourth Proportional to 31,006.22, 42,773.55 and 18,422.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,006.22 : 42,773.55 = 18,422.06 : x
2. Step 2: Convert to fraction form
   31,006.22/42,773.55 = 18,422.06/x
3. Step 3: Cross multiply
   31,006.22x = 42,773.55 × 18,422.06
4. Step 4: Simplify right side
   31,006.22x = 787,976,904.51
5. Step 5: Solve for x
   x = 787,976,904.51/31,006.22
6. Step 6: Final answer
   x = 25,413.51