Finding the Fourth Proportional to 425,789.42, 638,116.71 and 201,209.47

Step by Step Solution

1. Step 1: Write the proportion equation
   425,789.42 : 638,116.71 = 201,209.47 : x
2. Step 2: Convert to fraction form
   425,789.42/638,116.71 = 201,209.47/x
3. Step 3: Cross multiply
   425,789.42x = 638,116.71 × 201,209.47
4. Step 4: Simplify right side
   425,789.42x = 128,395,123,233.32
5. Step 5: Solve for x
   x = 128,395,123,233.32/425,789.42
6. Step 6: Final answer
   x = 301,546.06