Finding the Fourth Proportional to 200,820.12, 277,131.90 and 111,396.12

Step by Step Solution

1. Step 1: Write the proportion equation
   200,820.12 : 277,131.90 = 111,396.12 : x
2. Step 2: Convert to fraction form
   200,820.12/277,131.90 = 111,396.12/x
3. Step 3: Cross multiply
   200,820.12x = 277,131.90 × 111,396.12
4. Step 4: Simplify right side
   200,820.12x = 30,871,418,388.23
5. Step 5: Solve for x
   x = 30,871,418,388.23/200,820.12
6. Step 6: Final answer
   x = 153,726.72