Finding the Fourth Proportional to 31,126.86, 42,953.77 and 18,384.14

Step by Step Solution

1. Step 1: Write the proportion equation
   31,126.86 : 42,953.77 = 18,384.14 : x
2. Step 2: Convert to fraction form
   31,126.86/42,953.77 = 18,384.14/x
3. Step 3: Cross multiply
   31,126.86x = 42,953.77 × 18,384.14
4. Step 4: Simplify right side
   31,126.86x = 789,668,079.06
5. Step 5: Solve for x
   x = 789,668,079.06/31,126.86
6. Step 6: Final answer
   x = 25,369.35