Finding the Fourth Proportional to 209,483.21, 312,482.46 and 189,304.49

Step by Step Solution

1. Step 1: Write the proportion equation
   209,483.21 : 312,482.46 = 189,304.49 : x
2. Step 2: Convert to fraction form
   209,483.21/312,482.46 = 189,304.49/x
3. Step 3: Cross multiply
   209,483.21x = 312,482.46 × 189,304.49
4. Step 4: Simplify right side
   209,483.21x = 59,154,333,150.51
5. Step 5: Solve for x
   x = 59,154,333,150.51/209,483.21
6. Step 6: Final answer
   x = 282,382.21