Finding the Fourth Proportional to 31,098.72, 42,858.72 and 22,146.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,098.72 : 42,858.72 = 22,146.96 : x
2. Step 2: Convert to fraction form
   31,098.72/42,858.72 = 22,146.96/x
3. Step 3: Cross multiply
   31,098.72x = 42,858.72 × 22,146.96
4. Step 4: Simplify right side
   31,098.72x = 949,190,357.49
5. Step 5: Solve for x
   x = 949,190,357.49/31,098.72
6. Step 6: Final answer
   x = 30,521.85