Finding the Fourth Proportional to 200,810.25, 277,131.11 and 111,386.25

Step by Step Solution

1. Step 1: Write the proportion equation
   200,810.25 : 277,131.11 = 111,386.25 : x
2. Step 2: Convert to fraction form
   200,810.25/277,131.11 = 111,386.25/x
3. Step 3: Cross multiply
   200,810.25x = 277,131.11 × 111,386.25
4. Step 4: Simplify right side
   200,810.25x = 30,868,594,544.31
5. Step 5: Solve for x
   x = 30,868,594,544.31/200,810.25
6. Step 6: Final answer
   x = 153,720.21