Finding the Fourth Proportional to 200,100.49, 276,209.04 and 123,678.21

Step by Step Solution

1. Step 1: Write the proportion equation
   200,100.49 : 276,209.04 = 123,678.21 : x
2. Step 2: Convert to fraction form
   200,100.49/276,209.04 = 123,678.21/x
3. Step 3: Cross multiply
   200,100.49x = 276,209.04 × 123,678.21
4. Step 4: Simplify right side
   200,100.49x = 34,161,038,903.23
5. Step 5: Solve for x
   x = 34,161,038,903.23/200,100.49
6. Step 6: Final answer
   x = 170,719.41