Finding the Fourth Proportional to 31,075.10, 42,866.79 and 18,497.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,075.10 : 42,866.79 = 18,497.42 : x
2. Step 2: Convert to fraction form
   31,075.10/42,866.79 = 18,497.42/x
3. Step 3: Cross multiply
   31,075.10x = 42,866.79 × 18,497.42
4. Step 4: Simplify right side
   31,075.10x = 792,925,018.68
5. Step 5: Solve for x
   x = 792,925,018.68/31,075.10
6. Step 6: Final answer
   x = 25,516.41