Finding the Fourth Proportional to 31,098.72, 42,917.40 and 17,672.26

Step by Step Solution

1. Step 1: Write the proportion equation
   31,098.72 : 42,917.40 = 17,672.26 : x
2. Step 2: Convert to fraction form
   31,098.72/42,917.40 = 17,672.26/x
3. Step 3: Cross multiply
   31,098.72x = 42,917.40 × 17,672.26
4. Step 4: Simplify right side
   31,098.72x = 758,447,451.32
5. Step 5: Solve for x
   x = 758,447,451.32/31,098.72
6. Step 6: Final answer
   x = 24,388.38