Finding the Fourth Proportional to 31,155.84, 42,996.42 and 19,217.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,155.84 : 42,996.42 = 19,217.25 : x
2. Step 2: Convert to fraction form
   31,155.84/42,996.42 = 19,217.25/x
3. Step 3: Cross multiply
   31,155.84x = 42,996.42 × 19,217.25
4. Step 4: Simplify right side
   31,155.84x = 826,272,952.25
5. Step 5: Solve for x
   x = 826,272,952.25/31,155.84
6. Step 6: Final answer
   x = 26,520.64