Finding the Fourth Proportional to 31,102.03, 42,907.88 and 18,350.15

Step by Step Solution

1. Step 1: Write the proportion equation
   31,102.03 : 42,907.88 = 18,350.15 : x
2. Step 2: Convert to fraction form
   31,102.03/42,907.88 = 18,350.15/x
3. Step 3: Cross multiply
   31,102.03x = 42,907.88 × 18,350.15
4. Step 4: Simplify right side
   31,102.03x = 787,365,762.30
5. Step 5: Solve for x
   x = 787,365,762.30/31,102.03
6. Step 6: Final answer
   x = 25,315.58