Finding the Fourth Proportional to 31,136.94, 42,974.55 and 18,562.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,136.94 : 42,974.55 = 18,562.50 : x
2. Step 2: Convert to fraction form
   31,136.94/42,974.55 = 18,562.50/x
3. Step 3: Cross multiply
   31,136.94x = 42,974.55 × 18,562.50
4. Step 4: Simplify right side
   31,136.94x = 797,715,084.38
5. Step 5: Solve for x
   x = 797,715,084.38/31,136.94
6. Step 6: Final answer
   x = 25,619.57