Finding the Fourth Proportional to 31,097.09, 42,902.57 and 19,925.57

Step by Step Solution

1. Step 1: Write the proportion equation
   31,097.09 : 42,902.57 = 19,925.57 : x
2. Step 2: Convert to fraction form
   31,097.09/42,902.57 = 19,925.57/x
3. Step 3: Cross multiply
   31,097.09x = 42,902.57 × 19,925.57
4. Step 4: Simplify right side
   31,097.09x = 854,857,847.57
5. Step 5: Solve for x
   x = 854,857,847.57/31,097.09
6. Step 6: Final answer
   x = 27,489.97