Finding the Fourth Proportional to 31,002.89, 42,708.05 and 22,479.97

Step by Step Solution

1. Step 1: Write the proportion equation
   31,002.89 : 42,708.05 = 22,479.97 : x
2. Step 2: Convert to fraction form
   31,002.89/42,708.05 = 22,479.97/x
3. Step 3: Cross multiply
   31,002.89x = 42,708.05 × 22,479.97
4. Step 4: Simplify right side
   31,002.89x = 960,075,356.82
5. Step 5: Solve for x
   x = 960,075,356.82/31,002.89
6. Step 6: Final answer
   x = 30,967.29