Finding the Fourth Proportional to 31,136.96, 42,981.46 and 19,212.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,136.96 : 42,981.46 = 19,212.32 : x
2. Step 2: Convert to fraction form
   31,136.96/42,981.46 = 19,212.32/x
3. Step 3: Cross multiply
   31,136.96x = 42,981.46 × 19,212.32
4. Step 4: Simplify right side
   31,136.96x = 825,773,563.59
5. Step 5: Solve for x
   x = 825,773,563.59/31,136.96
6. Step 6: Final answer
   x = 26,520.69